From 635d40691db7b130ff7d387e24d5517281f1777c Mon Sep 17 00:00:00 2001
From: Liam Brady <blu2.5@me.com>
Date: Wed, 16 Aug 2023 21:47:50 +0000
Subject: [PATCH] Add automatic beacon patches (#109)

SHA: 7281202ca997aec8efee93f37e9c0cced4bac006
Reason: push, by domfarolino

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
---
 index.html | 473 ++++++++++++++++++++++++++++++++---------------------
 1 file changed, 290 insertions(+), 183 deletions(-)

diff --git a/index.html b/index.html
index 156ade7..d8f69f4 100644
--- a/index.html
+++ b/index.html
@@ -6,7 +6,7 @@
   <link href="https://www.w3.org/StyleSheets/TR/2021/cg-draft" rel="stylesheet">
   <meta content="Bikeshed version d29f71adb, updated Wed Jul 19 11:08:56 2023 -0700" name="generator">
   <link href="https://wicg.github.io/fenced-frame/" rel="canonical">
-  <meta content="b04f68774404923b201720631c1aa47ae37eca9d" name="document-revision">
+  <meta content="7281202ca997aec8efee93f37e9c0cced4bac006" name="document-revision">
 <style>
 /* Put nice boxes around each algorithm. */
 [data-algorithm]:not(.heading) {
@@ -902,7 +902,7 @@
   <div class="head">
    <p data-fill-with="logo"><a class="logo" href="https://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2021/logos/W3C" width="72"> </a> </p>
    <h1 class="p-name no-ref" id="title">Fenced Frame</h1>
-   <p id="w3c-state"><a href="https://www.w3.org/standards/types#CG-DRAFT">Draft Community Group Report</a>, <time class="dt-updated" datetime="2023-08-10">10 August 2023</time></p>
+   <p id="w3c-state"><a href="https://www.w3.org/standards/types#CG-DRAFT">Draft Community Group Report</a>, <time class="dt-updated" datetime="2023-08-16">16 August 2023</time></p>
    <div data-fill-with="spec-metadata">
     <dl>
      <dt>This version:
@@ -957,6 +957,7 @@ <h2 class="no-num no-toc no-ref" id="contents">Table of Contents</h2>
        </ol>
       <li><a href="#fence-interface"><span class="secno">2.4</span> <span class="content">The <code class="idl"><span>Fence</span></code> interface</span></a>
       <li><a href="#new-request-destination"><span class="secno">2.5</span> <span class="content">New <span>request</span> <span>destination</span></span></a>
+      <li><a href="#automatic-reporting"><span class="secno">2.6</span> <span class="content">Automatic Reporting</span></a>
      </ol>
     <li>
      <a href="#html-integration"><span class="secno">3</span> <span class="content">HTML Integration</span></a>
@@ -1358,6 +1359,9 @@ <h4 class="heading settled" data-level="2.3.2" id="fenced-frame-config-struct"><
       <dt data-md><dfn class="dfn-paneled" data-dfn-for="automatic beacon data" data-dfn-type="dfn" data-export id="automatic-beacon-data-destination">destination</dfn>
       <dd data-md>
        <p>a <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list" id="ref-for-list⑤">list</a> of <code class="idl"><a data-link-type="idl" href="#enumdef-fencereportingdestination" id="ref-for-enumdef-fencereportingdestination③">FenceReportingDestination</a></code>s</p>
+      <dt data-md><dfn class="dfn-paneled" data-dfn-for="automatic beacon data" data-dfn-type="dfn" data-export id="automatic-beacon-data-once">once</dfn>
+      <dd data-md>
+       <p>a <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean">boolean</a></p>
      </dl>
    </dl>
    <div class="algorithm" data-algorithm="send a beacon">
@@ -1827,6 +1831,7 @@ <h3 class="heading settled" data-level="2.4" id="fence-interface"><span class="s
   <c- b>required</c-> <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString④"><c- b>DOMString</c-></a> <dfn class="dfn-paneled idl-code" data-dfn-for="FenceEvent" data-dfn-type="dict-member" data-export data-type="DOMString " id="dom-fenceevent-eventtype"><code><c- g>eventType</c-></code></dfn>;
   <c- b>required</c-> <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString⑤"><c- b>DOMString</c-></a> <dfn class="dfn-paneled idl-code" data-dfn-for="FenceEvent" data-dfn-type="dict-member" data-export data-type="DOMString " id="dom-fenceevent-eventdata"><code><c- g>eventData</c-></code></dfn>;
   <c- b>required</c-> <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#idl-sequence" id="ref-for-idl-sequence"><c- b>sequence</c-></a>&lt;<a data-link-type="idl-name" href="#enumdef-fencereportingdestination" id="ref-for-enumdef-fencereportingdestination⑤"><c- n>FenceReportingDestination</c-></a>> <dfn class="dfn-paneled idl-code" data-dfn-for="FenceEvent" data-dfn-type="dict-member" data-export data-type="sequence<FenceReportingDestination> " id="dom-fenceevent-destination"><code><c- g>destination</c-></code></dfn>;
+  <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-boolean" id="ref-for-idl-boolean"><c- b>boolean</c-></a> <dfn class="dfn-paneled idl-code" data-default="false" data-dfn-for="FenceEvent" data-dfn-type="dict-member" data-export data-type="boolean " id="dom-fenceevent-once"><code><c- g>once</c-></code></dfn> = <c- b>false</c->;
 };
 
 <c- b>typedef</c-> (<a data-link-type="idl-name" href="#dictdef-fenceevent" id="ref-for-dictdef-fenceevent"><c- n>FenceEvent</c-></a> <c- b>or</c-> <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString⑥"><c- b>DOMString</c-></a>) <dfn class="dfn-paneled idl-code" data-dfn-type="typedef" data-export id="typedefdef-reporteventtype"><code><c- g>ReportEventType</c-></code></dfn>;
@@ -1890,6 +1895,9 @@ <h3 class="heading settled" data-level="2.4" id="fence-interface"><span class="s
        <dt data-md><a data-link-type="dfn" href="#automatic-beacon-data-destination" id="ref-for-automatic-beacon-data-destination">destination</a>
        <dd data-md>
         <p><var>event</var>’s <code class="idl"><a data-link-type="idl" href="#dom-fenceevent-destination" id="ref-for-dom-fenceevent-destination①">destination</a></code></p>
+       <dt data-md><a data-link-type="dfn" href="#automatic-beacon-data-once" id="ref-for-automatic-beacon-data-once">once</a>
+       <dd data-md>
+        <p><var>event</var>’s <code class="idl"><a data-link-type="idl" href="#dom-fenceevent-once" id="ref-for-dom-fenceevent-once">once</a></code></p>
       </dl>
     </ol>
     <details class="wpt-tests-block" dir="ltr" lang="en" open>
@@ -1975,6 +1983,68 @@ <h3 class="heading settled" data-level="2.5" id="new-request-destination"><span
     <li data-md>
      <p>Features as HTML’s <code>&lt;fencedframe></code></p>
    </ul>
+   <h3 class="heading settled" data-level="2.6" id="automatic-reporting"><span class="secno">2.6. </span><span class="content">Automatic Reporting</span><a class="self-link" href="#automatic-reporting"></a></h3>
+   <p><em>This first introductory paragraph is non-normative.</em></p>
+   <p>A side effect of the fenced boundary model is that ads will lose the ability to know if a click
+resulted in a successful navigation. This is because the page loaded from a top-level <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigate" id="ref-for-navigate②"> navigation</a> originating from a fenced frame will not be allowed to report to the fenced frame that
+it loaded (through something like <code>window.<a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-opener" id="ref-for-dom-opener">opener</a></code>). Instead, we introduce a
+special event-level <a data-link-type="dfn" href="#pending-event-eventtype" id="ref-for-pending-event-eventtype②">reporting type</a>, <code>reserved.top_navigation</code>, which
+automatically sends an <a data-link-type="dfn" href="#report-an-event" id="ref-for-report-an-event②">event-level beacon</a> when a fenced frame initiates a
+successful <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigate" id="ref-for-navigate③">navigation</a> to a <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable">top-level traversable</a>.</p>
+   <div class="algorithm" data-algorithm="attempt to send an automatic beacon">
+     To <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="attempt-to-send-an-automatic-beacon">attempt to send an automatic beacon</dfn> given a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#source-snapshot-params" id="ref-for-source-snapshot-params">source snapshot params</a> <var>sourceSnapshotParams</var>, an <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#concept-origin" id="ref-for-concept-origin③">origin</a> <var>sourceOrigin</var>, a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document⑤">Document</a></code> <var>targetDocument</var>, and a <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#string" id="ref-for-string①④">string</a> <var>eventType</var>, run these steps: 
+    <ol>
+     <li data-md>
+      <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#assert" id="ref-for-assert④">Assert</a>: <var>eventType</var> is "<code>reserved.top_navigation</code>".</p>
+     <li data-md>
+      <p>If <var>targetDocument</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable">node navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①">traversable navigable</a> is not a <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable①">top-level
+ traversable</a>, abort these steps.</p>
+     <li data-md>
+      <p>If <var>sourceSnapshotParams</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#source-snapshot-params-activation" id="ref-for-source-snapshot-params-activation">has transient activation</a> is set to false,
+ abort these steps.</p>
+     <li data-md>
+      <p>Let <var>config</var> be <var>sourceSnapshotParams</var>’s <a data-link-type="dfn" href="#source-snapshot-params-initiator-fenced-frame-config-instance" id="ref-for-source-snapshot-params-initiator-fenced-frame-config-instance">initiator fenced frame config
+ instance</a>.</p>
+     <li data-md>
+      <p>If <var>config</var> is null, abort these steps.</p>
+      <p class="note" role="note"><span class="marker">Note:</span> Since this algorithm is called unconditionally for all navigations, this is used to catch
+ cases where a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigate" id="ref-for-navigate④">navigation</a> to a <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable②">top-level traversable</a> does not originate from a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②③">fencedframe</a></code>.</p>
+     <li data-md>
+      <p>Let <var>beacon data</var> be <var>config</var>’s <a data-link-type="dfn" href="#fenced-frame-config-instance-fenced-frame-reporter" id="ref-for-fenced-frame-config-instance-fenced-frame-reporter⑥">fenced frame reporter</a>'s <a data-link-type="dfn" href="#fenced-frame-reporter-automatic-beacon-data" id="ref-for-fenced-frame-reporter-automatic-beacon-data②">automatic beacon data</a>.</p>
+     <li data-md>
+      <p>If <var>beacon data</var> is null, abort these steps.</p>
+     <li data-md>
+      <p>If <var>sourceOrigin</var> is not <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#same-origin" id="ref-for-same-origin③">same origin</a> with <var>config</var>’s <a data-link-type="dfn" href="#fenced-frame-config-instance-mapped-url" id="ref-for-fenced-frame-config-instance-mapped-url④">mapped
+ url</a>'s <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-origin" id="ref-for-concept-url-origin③">origin</a>, abort these steps.</p>
+     <li data-md>
+      <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-iterate" id="ref-for-list-iterate③">For each</a> <var>destination</var> of <var>beacon data</var>’s <a data-link-type="dfn" href="#automatic-beacon-data-destination" id="ref-for-automatic-beacon-data-destination①">destination</a>:</p>
+      <ol>
+       <li data-md>
+        <p>Run <a data-link-type="dfn" href="#report-an-event" id="ref-for-report-an-event③">report an event</a> using <var>config</var>’s <a data-link-type="dfn" href="#fenced-frame-config-instance-fenced-frame-reporter" id="ref-for-fenced-frame-config-instance-fenced-frame-reporter⑦">fenced frame
+ reporter</a> with <var>destination</var>, <var>eventType</var>, and <var>beacon data</var>’s <a data-link-type="dfn" href="#automatic-beacon-data-eventdata" id="ref-for-automatic-beacon-data-eventdata①"> eventData</a>.</p>
+      </ol>
+     <li data-md>
+      <p>If <var>beacon data</var>’s <a data-link-type="dfn" href="#automatic-beacon-data-once" id="ref-for-automatic-beacon-data-once①">once</a> is true, set <var>config</var>’s <a data-link-type="dfn" href="#fenced-frame-config-instance-fenced-frame-reporter" id="ref-for-fenced-frame-config-instance-fenced-frame-reporter⑧">fenced frame reporter</a>'s <a data-link-type="dfn" href="#fenced-frame-reporter-automatic-beacon-data" id="ref-for-fenced-frame-reporter-automatic-beacon-data③">automatic beacon data</a> to
+  null.</p>
+    </ol>
+    <details class="wpt-tests-block" dir="ltr" lang="en" open>
+     <summary>Tests</summary>
+     <ul class="wpt-tests-list">
+      <li class="wpt-test"><a class="wpt-name" href="https://wpt.fyi/results/fenced-frame/automatic-beacon-click-handler.https.html" title="fenced-frame/automatic-beacon-click-handler.https.html">automatic-beacon-click-handler.https.html</a> <a class="wpt-live" href="https://wpt.live/fenced-frame/automatic-beacon-click-handler.https.html"><small>(live test)</small></a> <a class="wpt-source" href="https://github.com/web-platform-tests/wpt/blob/master/fenced-frame/automatic-beacon-click-handler.https.html"><small>(source)</small></a>
+      <li class="wpt-test"><a class="wpt-name" href="https://wpt.fyi/results/fenced-frame/automatic-beacon-two-events-clear.https.html" title="fenced-frame/automatic-beacon-two-events-clear.https.html">automatic-beacon-two-events-clear.https.html</a> <a class="wpt-live" href="https://wpt.live/fenced-frame/automatic-beacon-two-events-clear.https.html"><small>(live test)</small></a> <a class="wpt-source" href="https://github.com/web-platform-tests/wpt/blob/master/fenced-frame/automatic-beacon-two-events-clear.https.html"><small>(source)</small></a>
+      <li class="wpt-test"><a class="wpt-name" href="https://wpt.fyi/results/fenced-frame/automatic-beacon-two-events-persist.https.html" title="fenced-frame/automatic-beacon-two-events-persist.https.html">automatic-beacon-two-events-persist.https.html</a> <a class="wpt-live" href="https://wpt.live/fenced-frame/automatic-beacon-two-events-persist.https.html"><small>(live test)</small></a> <a class="wpt-source" href="https://github.com/web-platform-tests/wpt/blob/master/fenced-frame/automatic-beacon-two-events-persist.https.html"><small>(source)</small></a>
+      <li class="wpt-test"><a class="wpt-name" href="https://wpt.fyi/results/fenced-frame/automatic-beacon-unfenced-top.https.html" title="fenced-frame/automatic-beacon-unfenced-top.https.html">automatic-beacon-unfenced-top.https.html</a> <a class="wpt-live" href="https://wpt.live/fenced-frame/automatic-beacon-unfenced-top.https.html"><small>(live test)</small></a> <a class="wpt-source" href="https://github.com/web-platform-tests/wpt/blob/master/fenced-frame/automatic-beacon-unfenced-top.https.html"><small>(source)</small></a>
+     </ul>
+    </details>
+   </div>
+   <div class="algorithm" data-algorithm="automatic beacon patch">
+     Modify <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#attempt-to-populate-the-history-entry&apos;s-document" id="ref-for-attempt-to-populate-the-history-entry&apos;s-document">attempt to populate the history entry’s document</a> algorithm. In step 6,
+  substep 11, add a new step after step 5 that reads: 
+    <ol start="6">
+     <li data-md>
+      <p>if <var>failure</var> is false, then <a data-link-type="dfn" href="#attempt-to-send-an-automatic-beacon" id="ref-for-attempt-to-send-an-automatic-beacon">attempt to send an automatic beacon</a> given <var>sourceSnapshotParams</var>, <var>entry</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-document-state" id="ref-for-she-document-state">document state</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#document-state-initiator-origin" id="ref-for-document-state-initiator-origin">initiator origin</a>, <var>document</var>, and "<code>reserved.top_navigation</code>".</p>
+    </ol>
+   </div>
    <h2 class="heading settled" data-level="3" id="html-integration"><span class="secno">3. </span><span class="content">HTML Integration</span><a class="self-link" href="#html-integration"></a></h2>
    <h3 class="heading settled" data-level="3.1" id="window-extension"><span class="secno">3.1. </span><span class="content">Extensions to the <code class="idl"><a data-link-type="idl" href="https://html.spec.whatwg.org/multipage/nav-history-apis.html#window" id="ref-for-window">Window</a></code> interface</span><a class="self-link" href="#window-extension"></a></h3>
 <pre class="idl highlight def"><c- b>partial</c-> <c- b>interface</c-> <a class="idl-code" data-link-type="interface" href="https://html.spec.whatwg.org/multipage/nav-history-apis.html#window" id="ref-for-window①"><c- g>Window</c-></a> {
@@ -2009,7 +2079,7 @@ <h3 class="heading settled" data-level="3.2" id="creating-browsing-contexts-patc
     <p>to instead use the tighter condition:</p>
     <ul>
      <li data-md>
-      <p>If <var>creator</var> is non-null and <var>embedder</var> is not a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②③">fencedframe</a></code> element,
+      <p>If <var>creator</var> is non-null and <var>embedder</var> is not a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②④">fencedframe</a></code> element,
 then:</p>
     </ul>
     <p class="note" role="note"><span class="marker">Note:</span> This is because we need to ensure that we do not leak <var>creator</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/dom.html#the-document&apos;s-referrer" id="ref-for-the-document&apos;s-referrer">referrer</a>, <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-document-origin" id="ref-for-concept-document-origin">origin</a>, <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#creator-base-url" id="ref-for-creator-base-url">creator base url</a>, <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/dom.html#concept-document-policy-container" id="ref-for-concept-document-policy-container">policy
@@ -2022,9 +2092,9 @@ <h3 class="heading settled" data-level="3.2" id="creating-browsing-contexts-patc
     </ol>
    </div>
    <h3 class="heading settled" data-level="3.3" id="local-scheme-policy-container-inheritance"><span class="secno">3.3. </span><span class="content">Policy container inheritance</span><a class="self-link" href="#local-scheme-policy-container-inheritance"></a></h3>
-   <p>When making a <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#navigation-request" id="ref-for-navigation-request③">navigation request</a> to a <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#is-local" id="ref-for-is-local">local</a> <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url" id="ref-for-concept-url②">URL</a>, <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element③">iframe</a></code>s clone their <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/dom.html#concept-document-policy-container" id="ref-for-concept-document-policy-container①">policy container</a> from the <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#navigation-request" id="ref-for-navigation-request④">navigation request</a>'s <em>initiator</em> <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document⑤">Document</a></code>. If <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②④">fencedframe</a></code>s were to do the same thing, that would allow information about the initiator’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/dom.html#concept-document-policy-container" id="ref-for-concept-document-policy-container②">policy container</a> to leak across a fenced frame boundary. This section patches <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/dom.html#concept-document-policy-container" id="ref-for-concept-document-policy-container③">policy container</a> inheritance to close that leak.</p>
+   <p>When making a <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#navigation-request" id="ref-for-navigation-request③">navigation request</a> to a <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#is-local" id="ref-for-is-local">local</a> <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url" id="ref-for-concept-url②">URL</a>, <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element③">iframe</a></code>s clone their <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/dom.html#concept-document-policy-container" id="ref-for-concept-document-policy-container①">policy container</a> from the <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#navigation-request" id="ref-for-navigation-request④">navigation request</a>'s <em>initiator</em> <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document⑥">Document</a></code>. If <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②⑤">fencedframe</a></code>s were to do the same thing, that would allow information about the initiator’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/dom.html#concept-document-policy-container" id="ref-for-concept-document-policy-container②">policy container</a> to leak across a fenced frame boundary. This section patches <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/dom.html#concept-document-policy-container" id="ref-for-concept-document-policy-container③">policy container</a> inheritance to close that leak.</p>
    <div class="algorithm" data-algorithm="local-policy-inheritance-determine-params">
-     Modify the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#determining-navigation-params-policy-container" id="ref-for-determining-navigation-params-policy-container">determine navigation params policy container</a> algorithm to have a new optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean">boolean</a> parameter <var>fenced</var> that defaults to false. 
+     Modify the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#determining-navigation-params-policy-container" id="ref-for-determining-navigation-params-policy-container">determine navigation params policy container</a> algorithm to have a new optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean①">boolean</a> parameter <var>fenced</var> that defaults to false. 
     <p>Rewrite step 3 to read:</p>
     <ol start="3">
      <li data-md>
@@ -2040,34 +2110,34 @@ <h3 class="heading settled" data-level="3.3" id="local-scheme-policy-container-i
      <li data-md>
       <p>Let <var>fenced</var> be true if <var>navigable</var> is a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable⑦">fenced navigable</a>,
   false otherwise.</p>
-      <p class="note" role="note"><span class="marker">Note:</span> This ensures <var>fenced</var> is true regardless of whether the initiator <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document⑥">Document</a></code> is <var>navigable</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-document" id="ref-for-nav-document">active document</a> or its <a data-link-type="dfn" href="#navigable-unfenced-parent" id="ref-for-navigable-unfenced-parent">unfenced parent</a>.</p>
+      <p class="note" role="note"><span class="marker">Note:</span> This ensures <var>fenced</var> is true regardless of whether the initiator <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document⑦">Document</a></code> is <var>navigable</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-document" id="ref-for-nav-document">active document</a> or its <a data-link-type="dfn" href="#navigable-unfenced-parent" id="ref-for-navigable-unfenced-parent">unfenced parent</a>.</p>
     </ol>
     <p>Rewrite step 23 (now step 24) to read:</p>
     <ol start="24">
      <li data-md>
       <p>Let <var>resultPolicyContainer</var> be the result of <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#determining-navigation-params-policy-container" id="ref-for-determining-navigation-params-policy-container①">determining navigation params
-  policy container</a> given <var>response</var>’s <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#concept-response-url" id="ref-for-concept-response-url">URL</a>, <var> entry</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-document-state" id="ref-for-she-document-state">document state</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#document-state-history-policy-container" id="ref-for-document-state-history-policy-container">history policy container</a>, <var> sourceSnapshotParams</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#source-snapshot-params-policy-container" id="ref-for-source-snapshot-params-policy-container">source policy container</a>, null, <var>responsePolicyContainer</var>, and <var>fenced</var>.</p>
+  policy container</a> given <var>response</var>’s <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#concept-response-url" id="ref-for-concept-response-url">URL</a>, <var> entry</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-document-state" id="ref-for-she-document-state①">document state</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#document-state-history-policy-container" id="ref-for-document-state-history-policy-container">history policy container</a>, <var> sourceSnapshotParams</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#source-snapshot-params-policy-container" id="ref-for-source-snapshot-params-policy-container">source policy container</a>, null, <var>responsePolicyContainer</var>, and <var>fenced</var>.</p>
     </ol>
    </div>
-   <p class="note" role="note"><span class="marker">Note:</span> <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②⑤">fencedframe</a></code> <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#policy-container" id="ref-for-policy-container">policy container</a> inheritance upon initial <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document⑦">Document</a></code> creation is handled
+   <p class="note" role="note"><span class="marker">Note:</span> <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②⑥">fencedframe</a></code> <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#policy-container" id="ref-for-policy-container">policy container</a> inheritance upon initial <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document⑧">Document</a></code> creation is handled
 in the <a href="#creating-browsing-contexts-patch">§ 3.2 Modifications to creating browsing contexts</a> section.</p>
    <h3 class="heading settled" data-level="3.4" id="nested-traversables"><span class="secno">3.4. </span><span class="content">Nested traversables</span><a class="self-link" href="#nested-traversables"></a></h3>
    <h4 class="heading settled" data-level="3.4.1" id="nested-traversables-intro"><span class="secno">3.4.1. </span><span class="content">Introduction</span><a class="self-link" href="#nested-traversables-intro"></a></h4>
    <p><em>This section is non-normative.</em></p>
-   <p>The <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> Standard organizes <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable">navigables</a> into two categories: <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable">child navigables</a> and <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①">traversable navigables</a> (also known as <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable">top-level traversables</a>). The introduction of features
+   <p>The <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> Standard organizes <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable">navigables</a> into two categories: <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable">child navigables</a> and <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable②">traversable navigables</a> (also known as <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable③">top-level traversables</a>). The introduction of features
 like fenced frames, and to a lesser extent <a href="https://github.com/wicg/portals">portals</a>,
-complicates this model by adding a new type of <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable②">traversable navigable</a> that is <em>sometimes</em> like a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable①">child navigable</a>. Because these new frame types are housed in a separate <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context-group" id="ref-for-browsing-context-group②">browsing context
+complicates this model by adding a new type of <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable③">traversable navigable</a> that is <em>sometimes</em> like a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable①">child navigable</a>. Because these new frame types are housed in a separate <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context-group" id="ref-for-browsing-context-group②">browsing context
 group</a> from their embedder, some concrete level of isolation is expected and required; on the other
 hand since they are composed visually inside of <em>other</em> <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context-group" id="ref-for-browsing-context-group③">browsing context groups</a>, sometimes they
 need to behave like the normal <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable②">child navigables</a> that we see in e.g., <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element④">iframe</a></code>s.</p>
-   <p>The complexity here is in deciding when terms like <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable-container" id="ref-for-navigable-container">navigable container</a>, <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent">navigable parent</a>, and <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#descendant-navigables" id="ref-for-descendant-navigables">descendant navigables</a> need to cross the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable③">traversable navigable</a>/<a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context-group" id="ref-for-browsing-context-group④">browsing context group</a> boundary, versus when doing so would be unsafe
+   <p>The complexity here is in deciding when terms like <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable-container" id="ref-for-navigable-container">navigable container</a>, <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent">navigable parent</a>, and <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#descendant-navigables" id="ref-for-descendant-navigables">descendant navigables</a> need to cross the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable④">traversable navigable</a>/<a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context-group" id="ref-for-browsing-context-group④">browsing context group</a> boundary, versus when doing so would be unsafe
 or incorrect. The examples below illustrate this point.</p>
    <p class="example" id="fenced-user-activation"><a class="self-link" href="#fenced-user-activation"></a>When a user <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#tracking-user-activation" id="ref-for-tracking-user-activation">activates</a> content inside
-of a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document⑧">Document</a></code>, ordinarily the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#activation-notification" id="ref-for-activation-notification">activation notification</a> steps give user activation to all <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#ancestor-navigables" id="ref-for-ancestor-navigables">ancestor navigables</a> and all <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#same-origin" id="ref-for-same-origin③">same origin</a> <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#descendant-navigables" id="ref-for-descendant-navigables①">descendant navigables</a>. But
-because a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②⑥">fencedframe</a></code> can host sensitive content that needs to be isolated from its embedder,
+of a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document⑨">Document</a></code>, ordinarily the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#activation-notification" id="ref-for-activation-notification">activation notification</a> steps give user activation to all <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#ancestor-navigables" id="ref-for-ancestor-navigables">ancestor navigables</a> and all <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#same-origin" id="ref-for-same-origin④">same origin</a> <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#descendant-navigables" id="ref-for-descendant-navigables①">descendant navigables</a>. But
+because a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②⑦">fencedframe</a></code> can host sensitive content that needs to be isolated from its embedder,
 and because <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#tracking-user-activation" id="ref-for-tracking-user-activation①">user activation</a> and <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#consume-user-activation" id="ref-for-consume-user-activation">consumption</a> offer a communication
-vector between these two parties, for the purpose of user activation a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②⑦">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable⑧">fenced navigable</a> cannot not be considered a descendant of its
-embedder, nor can its embedder be considered an ancestor of the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②⑧">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable⑨">fenced navigable</a>, in the way that the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#tracking-user-activation" id="ref-for-tracking-user-activation②">user activation</a> algorithms currently use those
+vector between these two parties, for the purpose of user activation a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②⑧">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable⑧">fenced navigable</a> cannot not be considered a descendant of its
+embedder, nor can its embedder be considered an ancestor of the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②⑨">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable⑨">fenced navigable</a>, in the way that the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#tracking-user-activation" id="ref-for-tracking-user-activation②">user activation</a> algorithms currently use those
 terms. In other words, we consider user activation to be <em>fenced</em>, to denote that it never crosses
 the <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①⓪">fenced navigable</a> boundary; if it were unfenced, it would behave
 as it would with <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element⑤">iframe</a></code>s, allowing <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#tracking-user-activation" id="ref-for-tracking-user-activation③">user activation</a> to flow freely across the frame
@@ -2078,16 +2148,16 @@ <h4 class="heading settled" data-level="3.4.1" id="nested-traversables-intro"><s
      <li class="wpt-test"><a class="wpt-name" href="https://wpt.fyi/results/fenced-frame/consume-user-activation.https.html" title="fenced-frame/consume-user-activation.https.html">consume-user-activation.https.html</a> <a class="wpt-live" href="https://wpt.live/fenced-frame/consume-user-activation.https.html"><small>(live test)</small></a> <a class="wpt-source" href="https://github.com/web-platform-tests/wpt/blob/master/fenced-frame/consume-user-activation.https.html"><small>(source)</small></a>
     </ul>
    </details>
-   <p class="example" id="unfenced-sandbox-inheritance"><a class="self-link" href="#unfenced-sandbox-inheritance"></a>Unlike <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#tracking-user-activation" id="ref-for-tracking-user-activation④">user activation</a>, when a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe②⑨">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①①">fenced navigable</a> gets <a data-link-type="dfn" href="#create-a-new-nested-traversable" id="ref-for-create-a-new-nested-traversable①">created</a> or <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigate" id="ref-for-navigate②">navigated</a>, it <span class="allow-2119">must</span> <a href="https://html.spec.whatwg.org/#sandboxing:active-sandboxing-flag-set-3">inherit</a> its embedder <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document⑨">Document</a></code>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#active-sandboxing-flag-set" id="ref-for-active-sandboxing-flag-set">active sandboxing flag set</a> as is standard for <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①⓪">Document</a></code>s in normal <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable③">child navigables</a>. If we did not do this, then the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③⓪">fencedframe</a></code> element would be a trivial
-sandbox bypass. Because <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③①">fencedframe</a></code> sandbox flag inheritance behaves similarly to how it does in <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element⑥">iframe</a></code> elements, we consider sandbox inheritance to be <em>unfenced</em>.</p>
+   <p class="example" id="unfenced-sandbox-inheritance"><a class="self-link" href="#unfenced-sandbox-inheritance"></a>Unlike <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#tracking-user-activation" id="ref-for-tracking-user-activation④">user activation</a>, when a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③⓪">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①①">fenced navigable</a> gets <a data-link-type="dfn" href="#create-a-new-nested-traversable" id="ref-for-create-a-new-nested-traversable①">created</a> or <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigate" id="ref-for-navigate⑤">navigated</a>, it <span class="allow-2119">must</span> <a href="https://html.spec.whatwg.org/#sandboxing:active-sandboxing-flag-set-3">inherit</a> its embedder <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①⓪">Document</a></code>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#active-sandboxing-flag-set" id="ref-for-active-sandboxing-flag-set">active sandboxing flag set</a> as is standard for <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①①">Document</a></code>s in normal <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable③">child navigables</a>. If we did not do this, then the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③①">fencedframe</a></code> element would be a trivial
+sandbox bypass. Because <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③②">fencedframe</a></code> sandbox flag inheritance behaves similarly to how it does in <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element⑥">iframe</a></code> elements, we consider sandbox inheritance to be <em>unfenced</em>.</p>
    <p>To provide the isolation mentioned above, and its conditional relaxation, this specification defines
-a new kind of parent for <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable④">traversable navigables</a> called an <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent">unfenced
+a new kind of parent for <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable⑤">traversable navigables</a> called an <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent">unfenced
 parent</a>, which provides a link to its embedder that algorithms can intentionally use when they need
 to be <em>unfenced</em>, as described above.</p>
    <p class="note" role="note"><span class="marker">Note:</span> Introducing a new kind of parent (<a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent①">unfenced parent</a>) is an intentional
-design decision. It means that by default, the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③②">fencedframe</a></code> boundary is private and isolated,
-since by default nothing in the web platform traverses from a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③③">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①②">fenced navigable</a> to its embedder. Care <span class="allow-2119">must</span> be taken when
-modifying algorithms to make them capable of traversing across the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③④">fencedframe</a></code> <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①③">fenced navigable</a> boundary, and each modification of this sort will be evaluated
+design decision. It means that by default, the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③③">fencedframe</a></code> boundary is private and isolated,
+since by default nothing in the web platform traverses from a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③④">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①②">fenced navigable</a> to its embedder. Care <span class="allow-2119">must</span> be taken when
+modifying algorithms to make them capable of traversing across the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③⑤">fencedframe</a></code> <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①③">fenced navigable</a> boundary, and each modification of this sort will be evaluated
 independently and appear in this specification.</p>
    <p>The rest of this section provides patches to various <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> definitions (and their uses) that deal
 with collections of related navigables, with the intention of fencing and unfencing various parts of
@@ -2095,12 +2165,12 @@ <h4 class="heading settled" data-level="3.4.1" id="nested-traversables-intro"><s
    <h4 class="heading settled" data-level="3.4.2" id="traversable-navigables"><span class="secno">3.4.2. </span><span class="content">Traversable navigables</span><a class="self-link" href="#traversable-navigables"></a></h4>
    <p>In <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a>'s <a href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="0cfb9abe0">Traversable
 navigables</a> section, add the following:</p>
-   <p>In addition to the properties of a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable①">navigable</a>, a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable⑤">traversable navigable</a> has:</p>
+   <p>In addition to the properties of a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable①">navigable</a>, a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable⑥">traversable navigable</a> has:</p>
    <ul>
     <li data-md>
      <p>An <dfn class="dfn-paneled" data-dfn-for="traversable navigable" data-dfn-type="dfn" data-noexport id="traversable-navigable-unfenced-parent">unfenced parent</dfn>, a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable②">navigable</a> or null, initially null.</p>
    </ul>
-   <p class="note" role="note"><span class="marker">Note:</span> The <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent②">unfenced parent</a> link is what gives a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③⑤">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①④">fenced navigable</a> a link to its embedder, which is used carefully for
+   <p class="note" role="note"><span class="marker">Note:</span> The <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent②">unfenced parent</a> link is what gives a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③⑥">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①④">fenced navigable</a> a link to its embedder, which is used carefully for
 things that need to be "<em>unfenced</em>", like some algorithms in the focus processing model.</p>
    <div class="algorithm" data-algorithm="unfenced parent" data-algorithm-for="navigable">
      To get the <dfn class="dfn-paneled" data-dfn-for="navigable" data-dfn-type="dfn" data-noexport id="navigable-unfenced-parent">unfenced parent</dfn> of a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable③">navigable</a> <var>navigable</var>: 
@@ -2108,11 +2178,11 @@ <h4 class="heading settled" data-level="3.4.2" id="traversable-navigables"><span
      <li data-md>
       <p>If <var>navigable</var> is a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable④">child navigable</a>, return <var>navigable</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent①">parent</a>.</p>
      <li data-md>
-      <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#assert" id="ref-for-assert④">Assert</a>: <var>navigable</var> is a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①⑤">fenced navigable</a>.</p>
+      <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#assert" id="ref-for-assert⑤">Assert</a>: <var>navigable</var> is a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①⑤">fenced navigable</a>.</p>
      <li data-md>
       <p>Return <var>navigable</var>’s <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent③">unfenced parent</a>.</p>
     </ol>
-    <p class="note" role="note"><span class="marker">Note:</span> This algorithm is different from the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable⑥">traversable navigable</a>'s <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent④">unfenced parent</a> getter in that this algorithm first tries to get the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable④">navigable</a>'s
+    <p class="note" role="note"><span class="marker">Note:</span> This algorithm is different from the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable⑦">traversable navigable</a>'s <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent④">unfenced parent</a> getter in that this algorithm first tries to get the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable④">navigable</a>'s
     normal <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent②">parent</a> if <var>navigable</var> is a normal <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable⑤">child navigable</a>.</p>
    </div>
    <div class="algorithm" data-algorithm="unfenced container document" data-algorithm-for="navigable">
@@ -2128,10 +2198,10 @@ <h4 class="heading settled" data-level="3.4.3" id="nested-traversables-inner"><s
    <p>In <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a>'s <a href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigables">Navigables</a> section, add a new subsection titled "Nested traversables" with the following text, definitions, and
 algorithms.</p>
    <p>Similar to <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable-container" id="ref-for-navigable-container①">navigable containers</a> and their respective <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#content-navigable" id="ref-for-content-navigable①">content navigables</a>,
-other elements (so far, only the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③⑥">fencedframe</a></code> element) present a more isolated <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable⑥">navigable</a> to
+other elements (so far, only the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③⑦">fencedframe</a></code> element) present a more isolated <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable⑥">navigable</a> to
 the user. These elements are called <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="fenced-navigable-containers">fenced navigable containers</dfn>.</p>
    <p>A <a data-link-type="dfn" href="#fenced-navigable-containers" id="ref-for-fenced-navigable-containers">fenced navigable container</a> has a <dfn class="dfn-paneled" data-dfn-for="fenced navigable container" data-dfn-type="dfn" data-noexport id="fenced-navigable-container-fenced-navigable">fenced navigable</dfn>,
-which is either a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable⑦">traversable navigable</a> with a non-null <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent⑤">unfenced
+which is either a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable⑧">traversable navigable</a> with a non-null <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent⑤">unfenced
 parent</a>, or null. It is initially null.</p>
    <details class="wpt-tests-block" dir="ltr" lang="en" open>
     <summary>Tests</summary>
@@ -2140,7 +2210,7 @@ <h4 class="heading settled" data-level="3.4.3" id="nested-traversables-inner"><s
     </ul>
    </details>
    <div class="algorithm" data-algorithm="initialize the nested traversable">
-     To <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="initialize-the-nested-traversable">initialize the nested traversable</dfn> <var>traversable</var> given a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-document-state" id="ref-for-she-document-state①">document state</a> <var>documentState</var> and a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable⑦">navigable</a> <var>parent</var>: 
+     To <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="initialize-the-nested-traversable">initialize the nested traversable</dfn> <var>traversable</var> given a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-document-state" id="ref-for-she-document-state②">document state</a> <var>documentState</var> and a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable⑦">navigable</a> <var>parent</var>: 
     <ol>
      <li data-md>
       <p><a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#initialize-the-navigable" id="ref-for-initialize-the-navigable">Initialize the navigable</a> <var>traversable</var> given <var>documentState</var>.</p>
@@ -2160,11 +2230,11 @@ <h4 class="heading settled" data-level="3.4.3" id="nested-traversables-inner"><s
      <li data-md>
       <p>Let <var>document</var> be the second return value of <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#creating-a-new-browsing-context" id="ref-for-creating-a-new-browsing-context①">creating a new browsing context and document</a> given <var>element</var> <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-node-document" id="ref-for-concept-node-document①">node document</a>, <var>element</var>, and <var>group</var>.</p>
      <li data-md>
-      <p>Let <var>documentState</var> be a new <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-document-state" id="ref-for-she-document-state②">document state</a>, whose <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#document-state-document" id="ref-for-document-state-document">document</a> is <var>document</var>.</p>
+      <p>Let <var>documentState</var> be a new <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#she-document-state" id="ref-for-she-document-state③">document state</a>, whose <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#document-state-document" id="ref-for-document-state-document">document</a> is <var>document</var>.</p>
      <li data-md>
-      <p>Let <var>traversable</var> be a new <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable⑧">traversable navigable</a>.</p>
+      <p>Let <var>traversable</var> be a new <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable⑨">traversable navigable</a>.</p>
      <li data-md>
-      <p>Let <var>parentNavigable</var> be <var>element</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable">node navigable</a>.</p>
+      <p>Let <var>parentNavigable</var> be <var>element</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable①">node navigable</a>.</p>
      <li data-md>
       <p><a data-link-type="dfn" href="#initialize-the-nested-traversable" id="ref-for-initialize-the-nested-traversable">Initialize the nested traversable</a> <var>traversable</var> given <var>documentState</var> and <var>parentNavigable</var>.</p>
      <li data-md>
@@ -2180,21 +2250,21 @@ <h4 class="heading settled" data-level="3.4.3" id="nested-traversables-inner"><s
       <p>Return <var>traversable</var>.</p>
     </ol>
    </div>
-   <p class="note" role="note"><span class="marker">Note:</span> The <a data-link-type="dfn" href="#create-a-new-nested-traversable" id="ref-for-create-a-new-nested-traversable②">create a new nested traversable</a> algorithm creates the first kind of <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable⑨">traversable
-navigable</a> that is not a <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable①">top-level traversable</a>. This will require removing the note about
+   <p class="note" role="note"><span class="marker">Note:</span> The <a data-link-type="dfn" href="#create-a-new-nested-traversable" id="ref-for-create-a-new-nested-traversable②">create a new nested traversable</a> algorithm creates the first kind of <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①⓪">traversable
+navigable</a> that is not a <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable④">top-level traversable</a>. This will require removing the note about
 nested traversables in <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a>'s <a href="https://html.spec.whatwg.org/multipage/document-sequences.html#top-level-traversables">Top-level
 traversables</a> section.</p>
    <h4 class="heading settled" data-level="3.4.4" id="top-level-traversables"><span class="secno">3.4.4. </span><span class="content">Top-level traversables</span><a class="self-link" href="#top-level-traversables"></a></h4>
-   <p>The <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> Standard currently defines a <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable②">top-level traversable</a> as a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①⓪">traversable navigable</a> whose <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent③">parent</a> is null, however this is an insufficient definition that this
-specification changes. <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> mentions that outside of this specification, all <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①①">traversable
-navigables</a> are <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable③">top-level traversables</a>, but "envisions" future specifications that may want to
-create a kind of <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①②">traversable</a> that is nested, and achieves the nesting
-through a non-null <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent④">parent</a>; hence the distinction between <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable④">top-level traversables</a> and <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①③">traversable navigables</a> relies on the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent⑤">parent</a> null-ness.</p>
-   <p>The <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①⑦">fenced navigable</a> this specification proposes is precisely what <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> envisioned when carving out space for the distinction between <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable⑤">top-level traversables</a> and <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①④">traversable navigables</a>, however this specification does not make use of the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent⑥">parent</a> pointer for <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①⑧">fenced navigables</a>, for reasons
-described <a href="#nested-traversables-intro">above</a> (instead they use the <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent⑦">unfenced parent</a> pointer). That means by default, both <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable⑥">top-level traversables</a> and <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①⑨">fenced navigables</a> both have null <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent⑦">parents</a>, which renders
+   <p>The <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> Standard currently defines a <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable⑤">top-level traversable</a> as a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①①">traversable navigable</a> whose <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent③">parent</a> is null, however this is an insufficient definition that this
+specification changes. <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> mentions that outside of this specification, all <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①②">traversable
+navigables</a> are <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable⑥">top-level traversables</a>, but "envisions" future specifications that may want to
+create a kind of <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①③">traversable</a> that is nested, and achieves the nesting
+through a non-null <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent④">parent</a>; hence the distinction between <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable⑦">top-level traversables</a> and <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①④">traversable navigables</a> relies on the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent⑤">parent</a> null-ness.</p>
+   <p>The <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①⑦">fenced navigable</a> this specification proposes is precisely what <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> envisioned when carving out space for the distinction between <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable⑧">top-level traversables</a> and <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①⑤">traversable navigables</a>, however this specification does not make use of the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent⑥">parent</a> pointer for <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①⑧">fenced navigables</a>, for reasons
+described <a href="#nested-traversables-intro">above</a> (instead they use the <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent⑦">unfenced parent</a> pointer). That means by default, both <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable⑨">top-level traversables</a> and <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable①⑨">fenced navigables</a> both have null <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent⑦">parents</a>, which renders
 the distinction meaningless.</p>
-   <p>To mend the intended distinction between <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable⑦">top-level traversables</a> and <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable②⓪">fenced navigables</a>, patch the following definitions like so:</p>
-   <div class="algorithm" data-algorithm="top-level traversable"> A <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="top-level-traversable">top-level traversable</dfn> is a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①⑤">traversable navigable</a> whose <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent⑧">parent</a> and <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent⑧">unfenced parent</a> are both null. </div>
+   <p>To mend the intended distinction between <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable①⓪">top-level traversables</a> and <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable②⓪">fenced navigables</a>, patch the following definitions like so:</p>
+   <div class="algorithm" data-algorithm="top-level traversable"> A <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="top-level-traversable">top-level traversable</dfn> is a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①⑥">traversable navigable</a> whose <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent⑧">parent</a> and <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent⑧">unfenced parent</a> are both null. </div>
    <p><br></p>
    <div class="algorithm" data-algorithm="top-level traversable" data-algorithm-for="navigable">
      To get the <dfn data-dfn-for="navigable" data-dfn-type="dfn" data-noexport id="navigable-top-level-traversable">top-level traversable<a class="self-link" href="#navigable-top-level-traversable"></a></dfn> of a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable⑧">navigable</a> <var>inputNavigable</var>: 
@@ -2217,11 +2287,11 @@ <h4 class="heading settled" data-level="3.4.4" id="top-level-traversables"><span
       <p>Return <var>navigable</var>.</p>
     </ol>
    </div>
-   <p class="note" role="note"><span class="marker">Note:</span> With these new definitions, a <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable⑧">top-level traversable</a> is essentially "unfenced" as described
+   <p class="note" role="note"><span class="marker">Note:</span> With these new definitions, a <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable①①">top-level traversable</a> is essentially "unfenced" as described
 in the <a href="#nested-traversables-intro">§ 3.4.1 Introduction</a>.</p>
    <h3 class="heading settled" data-level="3.5" id="navigable-traversing-algorithms"><span class="secno">3.5. </span><span class="content">Modifications to navigable-traversing algorithms</span><a class="self-link" href="#navigable-traversing-algorithms"></a></h3>
    <div class="algorithm" data-algorithm="inclusive-descendant-navigables-patch">
-     Modify the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#inclusive-descendant-navigables" id="ref-for-inclusive-descendant-navigables">inclusive descendant navigables</a> algorithm to take a new optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean①">boolean</a> argument <var><dfn class="dfn-paneled" data-dfn-type="dfn" data-lt="inclusive-dn-unfenced" data-noexport id="inclusive-dn-unfenced">unfenced</dfn></var> that defaults to
+     Modify the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#inclusive-descendant-navigables" id="ref-for-inclusive-descendant-navigables">inclusive descendant navigables</a> algorithm to take a new optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean②">boolean</a> argument <var><dfn class="dfn-paneled" data-dfn-type="dfn" data-lt="inclusive-dn-unfenced" data-noexport id="inclusive-dn-unfenced">unfenced</dfn></var> that defaults to
   false. 
     <p>Further rewrite step 2 of this algorithm to:</p>
     <ol start="2">
@@ -2230,7 +2300,7 @@ <h3 class="heading settled" data-level="3.5" id="navigable-traversing-algorithms
     </ol>
    </div>
    <div class="algorithm" data-algorithm="descendant-navigables-patch">
-     Modify the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#descendant-navigables" id="ref-for-descendant-navigables③">descendant navigables</a> algorithm to take a new optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean②">boolean</a> argument <dfn class="dfn-paneled" data-dfn-type="dfn" data-lt="dn-unfenced" data-noexport id="dn-unfenced">unfenced</dfn> that defaults to false, and rewrite the algorithm
+     Modify the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#descendant-navigables" id="ref-for-descendant-navigables③">descendant navigables</a> algorithm to take a new optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean③">boolean</a> argument <dfn class="dfn-paneled" data-dfn-type="dfn" data-lt="dn-unfenced" data-noexport id="dn-unfenced">unfenced</dfn> that defaults to false, and rewrite the algorithm
   like so: 
     <ol>
      <li data-md>
@@ -2238,7 +2308,7 @@ <h3 class="heading settled" data-level="3.5" id="navigable-traversing-algorithms
      <li data-md>
       <p>Let <var>navigableContainers</var> be a <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list" id="ref-for-list①③">list</a> of all <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-shadow-including-descendant" id="ref-for-concept-shadow-including-descendant">shadow-including descendants</a> of <var>document</var> that are <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable-container" id="ref-for-navigable-container②">navigable containers</a> (or <a data-link-type="dfn" href="#fenced-navigable-containers" id="ref-for-fenced-navigable-containers①">fenced navigable containers</a>, if <var><a data-link-type="dfn" href="#dn-unfenced" id="ref-for-dn-unfenced①">unfenced</a></var> is true), in <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-shadow-including-tree-order" id="ref-for-concept-shadow-including-tree-order">shadow-including tree order</a>.</p>
      <li data-md>
-      <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-iterate" id="ref-for-list-iterate③">For each</a> <var>navigableContainer</var> of <var>navigableContainers</var>:</p>
+      <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-iterate" id="ref-for-list-iterate④">For each</a> <var>navigableContainer</var> of <var>navigableContainers</var>:</p>
       <ol>
        <li data-md>
         <p>If <var>navigableContainer</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#content-navigable" id="ref-for-content-navigable②">content navigable</a> and <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable②①">fenced navigable</a> are both null, then <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#iteration-continue" id="ref-for-iteration-continue">continue</a>.</p>
@@ -2255,19 +2325,19 @@ <h3 class="heading settled" data-level="3.5" id="navigable-traversing-algorithms
    <h3 class="heading settled" data-level="3.6" id="focusing-changes"><span class="secno">3.6. </span><span class="content">Modifications to the focusing algorithms</span><a class="self-link" href="#focusing-changes"></a></h3>
    <p>The <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> standard defines how to handle focusing elements and <code class="idl"><a data-link-type="idl" href="https://html.spec.whatwg.org/multipage/nav-history-apis.html#window" id="ref-for-window④">Window</a></code>s, both by user gesture
 and through script-initiated APIs. Since fenced frames are designed to prevent communication across
-a fenced frame boundary, we need to handle focusing carefully. This is because when focus crosses a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③⑦">fencedframe</a></code> boundary, contexts on both sides of the boundary can detect that change, which can
-be used to open a communication channel between a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③⑧">fencedframe</a></code> and its embedder.</p>
+a fenced frame boundary, we need to handle focusing carefully. This is because when focus crosses a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③⑧">fencedframe</a></code> boundary, contexts on both sides of the boundary can detect that change, which can
+be used to open a communication channel between a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③⑨">fencedframe</a></code> and its embedder.</p>
    <p>We do this by not allowing the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#focusing-steps" id="ref-for-focusing-steps">focusing steps</a> to move script-initiated focus across a fenced
 frame boundary.</p>
-   <p class="example" id="user-initiated-focus"><a class="self-link" href="#user-initiated-focus"></a>When a user clicks on an element like a <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/form-elements.html#the-button-element" id="ref-for-the-button-element">button</a></code> inside a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe③⑨">fencedframe</a></code> while another element <em>outside</em> of the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④⓪">fencedframe</a></code> is <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#focused" id="ref-for-focused">focused</a>, the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#focusing-steps" id="ref-for-focusing-steps①">focusing steps</a> will allow the <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/form-elements.html#the-button-element" id="ref-for-the-button-element①">button</a></code> to <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#gains-focus" id="ref-for-gains-focus">gain focus</a>, because this is specifically a
-user-initiated action. Without allowing that, no element inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④①">fencedframe</a></code> would never be
+   <p class="example" id="user-initiated-focus"><a class="self-link" href="#user-initiated-focus"></a>When a user clicks on an element like a <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/form-elements.html#the-button-element" id="ref-for-the-button-element">button</a></code> inside a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④⓪">fencedframe</a></code> while another element <em>outside</em> of the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④①">fencedframe</a></code> is <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#focused" id="ref-for-focused">focused</a>, the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#focusing-steps" id="ref-for-focusing-steps①">focusing steps</a> will allow the <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/form-elements.html#the-button-element" id="ref-for-the-button-element①">button</a></code> to <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#gains-focus" id="ref-for-gains-focus">gain focus</a>, because this is specifically a
+user-initiated action. Without allowing that, no element inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④②">fencedframe</a></code> would never be
 able <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#gains-focus" id="ref-for-gains-focus①">gain focus</a>.</p>
    <p class="example" id="script-initiated-focus"><a class="self-link" href="#script-initiated-focus"></a>If we were to continue allowing all elements to be <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#focused" id="ref-for-focused①">focused</a> via the <code class="idl"><a data-link-type="idl" href="https://html.spec.whatwg.org/multipage/interaction.html#dom-focus" id="ref-for-dom-focus">focus()</a></code> method as is the status quo before this
 specification, a <a data-link-type="dfn" href="#fenced-navigable-containers" id="ref-for-fenced-navigable-containers②">fenced navigable container</a> and its <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable②③">fenced
 navigable</a> could use a sequence of <code class="idl"><a data-link-type="idl" href="https://html.spec.whatwg.org/multipage/interaction.html#dom-focus" id="ref-for-dom-focus①">focus()</a></code> calls to send arbitrary data across
 the fenced frame boundary, which is a privacy leak. To avoid this, we effectively "fence" the <code class="idl"><a data-link-type="idl" href="https://html.spec.whatwg.org/multipage/interaction.html#dom-focus" id="ref-for-dom-focus②">focus()</a></code> method, which sacrifices some functionality for privacy.</p>
    <div class="algorithm" data-algorithm="focusing-steps-patch">
-     Modify the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#focusing-steps" id="ref-for-focusing-steps②">focusing steps</a> to take a new optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean③">boolean</a> argument <var><dfn class="dfn-paneled" data-dfn-type="dfn" data-lt="focus-unfenced" data-noexport id="focus-unfenced">unfenced</dfn></var> that defaults to false. 
+     Modify the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#focusing-steps" id="ref-for-focusing-steps②">focusing steps</a> to take a new optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean④">boolean</a> argument <var><dfn class="dfn-paneled" data-dfn-type="dfn" data-lt="focus-unfenced" data-noexport id="focus-unfenced">unfenced</dfn></var> that defaults to false. 
     <p>Add a new step after step 3 of the algorithm (that changes new focus target) that reads:</p>
     <ol start="3">
      <li data-md>
@@ -2276,7 +2346,7 @@ <h3 class="heading settled" data-level="3.6" id="focusing-changes"><span class="
     <p>Add a new step after the step that defines the <var>new chain</var> variable, that reads:</p>
     <ol start="9">
      <li data-md>
-      <p>If <var><a data-link-type="dfn" href="#focus-unfenced" id="ref-for-focus-unfenced">unfenced</a></var> is false, <var>new chain</var> <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-contain" id="ref-for-list-contain">contains</a> a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①①">Document</a></code> <var>document</var> whose <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable①">node navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-traversable" id="ref-for-nav-traversable">traversable navigable</a> is a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable②⑥">fenced navigable</a>, and <var>old chain</var> does not also <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-contain" id="ref-for-list-contain①">contain</a> <var>document</var>, then return.</p>
+      <p>If <var><a data-link-type="dfn" href="#focus-unfenced" id="ref-for-focus-unfenced">unfenced</a></var> is false, <var>new chain</var> <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-contain" id="ref-for-list-contain">contains</a> a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①②">Document</a></code> <var>document</var> whose <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable②">node navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-traversable" id="ref-for-nav-traversable">traversable navigable</a> is a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable②⑥">fenced navigable</a>, and <var>old chain</var> does not also <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-contain" id="ref-for-list-contain①">contain</a> <var>document</var>, then return.</p>
       <p class="note" role="note"><span class="marker">Note:</span> This is how we bail-out early just before calling the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#focus-update-steps" id="ref-for-focus-update-steps">focus update steps</a>, in the case
 where focus is trying to cross the fence.</p>
     </ol>
@@ -2339,9 +2409,9 @@ <h3 class="heading settled" data-level="3.6" id="focusing-changes"><span class="
      <li data-md>
       <p>If <var>currentObject</var> is a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#focusable-area" id="ref-for-focusable-area④">focusable area</a>, then set <var>currentObject</var> to <var>currentObject</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#dom-anchor" id="ref-for-dom-anchor">DOM
  anchor</a>'s <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-node-document" id="ref-for-concept-node-document②">node document</a>.</p>
-      <p>Otherwise, if <var>currentObject</var> is a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①②">Document</a></code> whose <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable②">node navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent①②">parent</a> is non-null, then set <var>currentObject</var> to <var>currentObject</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable③">node navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent①③">parent</a>.</p>
-      <p>Otherwise, if <var>currentObject</var> is a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①③">Document</a></code> whose <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable④">node navigable</a> is a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①⑥">traversable
- navigable</a> whose <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent①②">unfenced parent</a> is non-null, then set <var>currentObject</var> to <var>currentObject</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable⑤">node navigable</a>'s <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent①③">unfenced
+      <p>Otherwise, if <var>currentObject</var> is a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①③">Document</a></code> whose <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable③">node navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent①②">parent</a> is non-null, then set <var>currentObject</var> to <var>currentObject</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable④">node navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-parent" id="ref-for-nav-parent①③">parent</a>.</p>
+      <p>Otherwise, if <var>currentObject</var> is a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①④">Document</a></code> whose <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable⑤">node navigable</a> is a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①⑦">traversable
+ navigable</a> whose <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent①②">unfenced parent</a> is non-null, then set <var>currentObject</var> to <var>currentObject</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable⑥">node navigable</a>'s <a data-link-type="dfn" href="#traversable-navigable-unfenced-parent" id="ref-for-traversable-navigable-unfenced-parent①③">unfenced
  parent</a>.</p>
       <p>Otherwise, <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#iteration-break" id="ref-for-iteration-break①">break</a>.</p>
     </ol>
@@ -2375,8 +2445,8 @@ <h3 class="heading settled" data-level="3.6" id="focusing-changes"><span class="
     <p>Modify step 9 of the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#sequential-focus-navigation" id="ref-for-sequential-focus-navigation①">sequential focus navigation</a> algorithm to read:</p>
     <ol start="9">
      <li data-md>
-      <p>Otherwise, <var>starting point</var> is a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#focusable-area" id="ref-for-focusable-area⑤">focusable area</a> whose <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-node-document" id="ref-for-concept-node-document③">node document</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable⑥">node
- navigable</a> is a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable⑥">child navigable</a> or <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable③③">fenced navigable</a>. Set <var>starting point</var> to that <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable⑦">node navigable</a>'s <a data-link-type="dfn" href="#navigable-unfenced-parent" id="ref-for-navigable-unfenced-parent②">unfenced parent</a> and return to the
+      <p>Otherwise, <var>starting point</var> is a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/interaction.html#focusable-area" id="ref-for-focusable-area⑤">focusable area</a> whose <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-node-document" id="ref-for-concept-node-document③">node document</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable⑦">node
+ navigable</a> is a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable⑥">child navigable</a> or <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable③③">fenced navigable</a>. Set <var>starting point</var> to that <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable⑧">node navigable</a>'s <a data-link-type="dfn" href="#navigable-unfenced-parent" id="ref-for-navigable-unfenced-parent②">unfenced parent</a> and return to the
  step labeled <i>loop</i>.</p>
     </ol>
    </div>
@@ -2400,7 +2470,7 @@ <h3 class="heading settled" data-level="3.6" id="focusing-changes"><span class="
     </ul>
    </details>
    <h3 class="heading settled" data-level="3.7" id="navigation-patch"><span class="secno">3.7. </span><span class="content">Navigation</span><a class="self-link" href="#navigation-patch"></a></h3>
-   <p>This section describes how the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④②">fencedframe</a></code> element interacts with the ever-complicated process
+   <p>This section describes how the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④③">fencedframe</a></code> element interacts with the ever-complicated process
 of navigation, which includes integration with various headers, isolation mechanisms, and policies.</p>
    <h4 class="heading settled" data-level="3.7.1" id="supports-loading-mode"><span class="secno">3.7.1. </span><span class="content">The `<a data-link-type="http-header" href="https://wicg.github.io/nav-speculation/prerendering.html#http-headerdef-supports-loading-mode" id="ref-for-http-headerdef-supports-loading-mode"><code>Supports-Loading-Mode</code></a>` HTTP response header</span><a class="self-link" href="#supports-loading-mode"></a></h4>
    <p><i>This section is intended to monkeypatch the <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> Standard, however since the `<a data-link-type="http-header" href="https://wicg.github.io/nav-speculation/prerendering.html#http-headerdef-supports-loading-mode" id="ref-for-http-headerdef-supports-loading-mode①"><code>Supports-Loading-Mode</code></a>` header has not been merged into <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> yet,
@@ -2408,10 +2478,10 @@ <h4 class="heading settled" data-level="3.7.1" id="supports-loading-mode"><span
 monkeypatches that monkeypatch specification.</i></p>
    <p>Add the new <a data-link-type="dfn" href="https://www.rfc-editor.org/rfc/rfc8941.html#name-tokens" id="ref-for-name-tokens">token</a> below to the list of valid <a data-link-type="dfn" href="https://www.rfc-editor.org/rfc/rfc8941.html#name-tokens" id="ref-for-name-tokens①">tokens</a> for the `<a data-link-type="http-header" href="https://wicg.github.io/nav-speculation/prerendering.html#http-headerdef-supports-loading-mode" id="ref-for-http-headerdef-supports-loading-mode②"><code>Supports-Loading-Mode</code></a>` response header:</p>
    <p>The `<code><dfn class="dfn-paneled" data-dfn-for="Supports-Loading-Mode" data-dfn-type="dfn" data-export id="supports-loading-mode-fenced-frame">fenced-frame</dfn></code>` token indicates that
-the response can be used to create a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①④">Document</a></code> inside of a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable③⑥">fenced
+the response can be used to create a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①⑤">Document</a></code> inside of a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable③⑥">fenced
 navigable</a>. Without this explicit opt-in, all navigations inside of a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable③⑦">fenced navigable</a> will fail, as outlined in <a href="#navigation-patch">§ 3.7 Navigation</a>.</p>
    <div class="algorithm" data-algorithm="navigation-patch">
-     <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#attempt-to-populate-the-history-entry&apos;s-document" id="ref-for-attempt-to-populate-the-history-entry&apos;s-document">attempt to populate the history entry’s document</a> algorithm is modified such that
+     <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#attempt-to-populate-the-history-entry&apos;s-document" id="ref-for-attempt-to-populate-the-history-entry&apos;s-document①">attempt to populate the history entry’s document</a> algorithm is modified such that
   just before the step inside the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#queue-a-task" id="ref-for-queue-a-task">queued task</a> starting with "If <var>failure</var> is true, then:", insert a new step: 
     <ol start="8">
      <li data-md>
@@ -2431,7 +2501,7 @@ <h4 class="heading settled" data-level="3.7.1" id="supports-loading-mode"><span
    </div>
    <h4 class="heading settled" data-level="3.7.2" id="coop-coep"><span class="secno">3.7.2. </span><span class="content">COOP, COEP, and cross-origin isolation</span><a class="self-link" href="#coop-coep"></a></h4>
    <p>Outside of this specification, the `<a data-link-type="http-header" href="https://html.spec.whatwg.org/multipage/browsers.html#cross-origin-opener-policy-2" id="ref-for-cross-origin-opener-policy-2"><code>Cross-Origin-Opener-Policy</code></a>`
-header only <a href="https://html.spec.whatwg.org/C#populating-a-session-history-entry:top-level-traversable-2">applies</a> to <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable⑨">top-level traversables</a> instead of all <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable①⓪">navigables</a>, and this specification continues this
+header only <a href="https://html.spec.whatwg.org/C#populating-a-session-history-entry:top-level-traversable-2">applies</a> to <a data-link-type="dfn" href="#top-level-traversable" id="ref-for-top-level-traversable①②">top-level traversables</a> instead of all <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable①⓪">navigables</a>, and this specification continues this
 intention insofar as this header does not have an impact on <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable③⑨">fenced
 navigables</a>, nor is it inherited from its embedder. Consequently, the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context-group" id="ref-for-browsing-context-group⑥">browsing context group</a> hosted inside of a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable④⓪">fenced traversable navigable</a> will
 always have its <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#bcg-cross-origin-isolation" id="ref-for-bcg-cross-origin-isolation">cross-origin isolation mode</a> set to "<a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#cross-origin-isolation-none" id="ref-for-cross-origin-isolation-none"><code>none</code></a>".</p>
@@ -2449,7 +2519,7 @@ <h4 class="heading settled" data-level="3.7.2" id="coop-coep"><span class="secno
       <p><var>navigable</var>’s <a data-link-type="dfn" href="#navigable-unfenced-container-document" id="ref-for-navigable-unfenced-container-document">unfenced container document</a></p>
     </ul>
    </div>
-   <p class="note" role="note"><span class="marker">Note:</span> This causes navigations inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④③">fencedframe</a></code> to fail if they are not served with a
+   <p class="note" role="note"><span class="marker">Note:</span> This causes navigations inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④④">fencedframe</a></code> to fail if they are not served with a
 suitable `<a data-link-type="http-header" href="https://html.spec.whatwg.org/multipage/browsers.html#cross-origin-embedder-policy" id="ref-for-cross-origin-embedder-policy"><code>Cross-Origin-Embedder-Policy</code></a>` header, just as <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element⑦">iframe</a></code>s behave.</p>
    <p class="issue" id="issue-3fa4bcc3"><a class="self-link" href="#issue-3fa4bcc3"></a> Determine if we need to fence or unfence the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#queue-a-cross-origin-embedder-policy-inheritance-violation" id="ref-for-queue-a-cross-origin-embedder-policy-inheritance-violation">queue a cross-origin embedder policy
 inheritance violation</a> algorithm, as leaving it unfenced may cause a privacy leak.</p>
@@ -2480,19 +2550,36 @@ <h4 class="heading settled" data-level="3.7.2" id="coop-coep"><span class="secno
    </details>
    <h4 class="heading settled" data-level="3.7.3" id="navigation-changes"><span class="secno">3.7.3. </span><span class="content">Actual navigation changes</span><a class="self-link" href="#navigation-changes"></a></h4>
    <div class="algorithm" data-algorithm="source-snapshot-param-config">
-     Add a new <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#struct-item" id="ref-for-struct-item①⑨">item</a> to the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#source-snapshot-params" id="ref-for-source-snapshot-params">source snapshot params</a> <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#struct" id="ref-for-struct②②">struct</a>: 
+     Add two new <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#struct-item" id="ref-for-struct-item①⑨">item</a>s to the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#source-snapshot-params" id="ref-for-source-snapshot-params①">source snapshot params</a> <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#struct" id="ref-for-struct②②">struct</a>: 
     <dl>
-     <dt data-md><dfn class="dfn-paneled" data-dfn-for="source snapshot params" data-dfn-type="dfn" data-noexport id="source-snapshot-params-fenced-frame-config">fenced frame config</dfn>
+     <dt data-md><dfn class="dfn-paneled" data-dfn-for="source snapshot params" data-dfn-type="dfn" data-noexport id="source-snapshot-params-initiator-fenced-frame-config-instance">initiator fenced frame config instance</dfn>
+     <dd data-md>
+      <p>a <a data-link-type="dfn" href="#fenced-frame-config-instance" id="ref-for-fenced-frame-config-instance⑤">fenced frame config instance</a> or null, initially null.</p>
+     <dt data-md><dfn class="dfn-paneled" data-dfn-for="source snapshot params" data-dfn-type="dfn" data-noexport id="source-snapshot-params-target-fenced-frame-config">target fenced frame config</dfn>
      <dd data-md>
       <p>a <a data-link-type="dfn" href="#fenced-frame-config" id="ref-for-fenced-frame-config①⑨">fenced frame config</a> or null, initially null.</p>
     </dl>
+    <p class="note" role="note"><span class="marker">Note:</span> The <a data-link-type="dfn" href="#source-snapshot-params-initiator-fenced-frame-config-instance" id="ref-for-source-snapshot-params-initiator-fenced-frame-config-instance①">initiator fenced frame config instance</a> is the <a data-link-type="dfn" href="#fenced-frame-config-instance" id="ref-for-fenced-frame-config-instance⑥">fenced frame
+  config instance</a> that’s loaded into a navigation initiator’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context" id="ref-for-browsing-context①">browsing context</a>, if any exists.
+  It is used by the <a data-link-type="dfn" href="#attempt-to-send-an-automatic-beacon" id="ref-for-attempt-to-send-an-automatic-beacon①">attempt to send an automatic beacon</a> algorithm to retrieve the <a data-link-type="dfn" href="#fenced-frame-reporter-automatic-beacon-data" id="ref-for-fenced-frame-reporter-automatic-beacon-data④">automatic beacon data</a> to be sent out if the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④⑤">fencedframe</a></code>-initiated navigation
+  succeeds. The <a data-link-type="dfn" href="#source-snapshot-params-target-fenced-frame-config" id="ref-for-source-snapshot-params-target-fenced-frame-config">target fenced frame config</a> on the other hand, is the
+  non-<a data-link-type="dfn" href="#instantiate-a-config" id="ref-for-instantiate-a-config">instantiated</a> <a data-link-type="dfn" href="#fenced-frame-config" id="ref-for-fenced-frame-config②⓪">fenced frame config</a> that will be loaded into a a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④⑥">fencedframe</a></code> element for navigations targeting fenced frames. These fields do not interact <em>together</em> in any meaningful way.</p>
+   </div>
+   <div class="algorithm" data-algorithm="snapshot-source-snapshot-params">
+     Modify the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#snapshotting-source-snapshot-params" id="ref-for-snapshotting-source-snapshot-params">snapshot source snapshot params</a> algorithm to return a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#source-snapshot-params" id="ref-for-source-snapshot-params②">source snapshot params</a> with an additional field: 
+    <dl>
+     <dt data-md><a data-link-type="dfn" href="#source-snapshot-params-initiator-fenced-frame-config-instance" id="ref-for-source-snapshot-params-initiator-fenced-frame-config-instance②">initiator fenced frame config instance</a>
+     <dd data-md>
+      <p><var>sourceDocument</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context" id="ref-for-browsing-context②">browsing context</a>'s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance⑦">fenced frame
+ config instance</a></p>
+    </dl>
    </div>
    <div class="algorithm" data-algorithm="navigate">
-     Modify step 7 of <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigate" id="ref-for-navigate③">navigate</a> algorithm to include the following condition: 
+     Modify step 7 of <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigate" id="ref-for-navigate⑥">navigate</a> algorithm to include the following condition: 
     <ul>
      <li data-md>
       <p><var>navigable</var> is a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable④③">fenced navigable</a>;</p>
-      <p class="note" role="note"><span class="marker">Note:</span> This ensures that <em>all</em> navigations inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④④">fencedframe</a></code> are made with the "<a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#hh-replace" id="ref-for-hh-replace①"><code>replace</code></a>" mode, regardless of the initiator.</p>
+      <p class="note" role="note"><span class="marker">Note:</span> This ensures that <em>all</em> navigations inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④⑦">fencedframe</a></code> are made with the "<a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#hh-replace" id="ref-for-hh-replace①"><code>replace</code></a>" mode, regardless of the initiator.</p>
     </ul>
     <details class="wpt-tests-block" dir="ltr" lang="en" open>
      <summary>Tests</summary>
@@ -2505,9 +2592,9 @@ <h4 class="heading settled" data-level="3.7.3" id="navigation-changes"><span cla
     <p>Modify step 8 of the same algorithm to include the following condition:</p>
     <ul>
      <li data-md>
-      <p><var>sourceDocument</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable⑧">node navigable</a> is not a <a data-link-type="dfn" href="#fenced-navigable-containers" id="ref-for-fenced-navigable-containers①①">fenced navigable container</a> while at the same time <var>navigable</var> is a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable④④">fenced navigable</a>.</p>
+      <p><var>sourceDocument</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable⑨">node navigable</a> is not a <a data-link-type="dfn" href="#fenced-navigable-containers" id="ref-for-fenced-navigable-containers①①">fenced navigable container</a> while at the same time <var>navigable</var> is a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable④④">fenced navigable</a>.</p>
       <p class="note" role="note"><span class="marker">Note:</span> This ensures that embedder-initiated navigations can <em>never</em> trigger a fragment
-navigation inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④⑤">fencedframe</a></code>.</p>
+navigation inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④⑧">fencedframe</a></code>.</p>
     </ul>
     <details class="wpt-tests-block" dir="ltr" lang="en" open>
      <summary>Tests</summary>
@@ -2524,7 +2611,7 @@ <h4 class="heading settled" data-level="3.7.3" id="navigation-changes"><span cla
       <ol>
        <li data-md>
         <p>Let <var>config</var> be the result of <a data-link-type="dfn" href="#fenced-frame-config-mapping-find-a-config" id="ref-for-fenced-frame-config-mapping-find-a-config">finding a
- config</a> in <var>sourceDocument</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable⑨">node navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-traversable" id="ref-for-nav-traversable②">traversable
+ config</a> in <var>sourceDocument</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable①⓪">node navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-traversable" id="ref-for-nav-traversable②">traversable
  navigable</a>'s <a data-link-type="dfn" href="#traversable-navigable-fenced-frame-config-mapping" id="ref-for-traversable-navigable-fenced-frame-config-mapping①">fenced frame config mapping</a>.</p>
         <p class="note" role="note"><span class="marker">Note:</span> This might "wait" for an arbitrary period of time for the <var>config</var> associated with
  the <a data-link-type="dfn" href="https://www.ietf.org/rfc/rfc4122.txt#urn-uuid" id="ref-for-urn-uuid①①">urn uuid</a> <var>url</var> to be "finalized" in the <a data-link-type="dfn" href="#traversable-navigable-fenced-frame-config-mapping" id="ref-for-traversable-navigable-fenced-frame-config-mapping②">fenced frame config
@@ -2532,9 +2619,10 @@ <h4 class="heading settled" data-level="3.7.3" id="navigation-changes"><span cla
  any subsequent embedder-initiated navigations, <span class="allow-2119">should</span> they
  occur, by the usual mechanism that tracks the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#ongoing-navigation" id="ref-for-ongoing-navigation">ongoing navigation</a>.</p>
        <li data-md>
-        <p>Set <var>sourceSnapshotParams</var>’s <a data-link-type="dfn" href="#source-snapshot-params-fenced-frame-config" id="ref-for-source-snapshot-params-fenced-frame-config">fenced frame config</a> to <var>config</var>.</p>
+        <p>Set <var>sourceSnapshotParams</var>’s <a data-link-type="dfn" href="#source-snapshot-params-target-fenced-frame-config" id="ref-for-source-snapshot-params-target-fenced-frame-config①">target fenced frame
+ config</a> to <var>config</var>.</p>
        <li data-md>
-        <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#assert" id="ref-for-assert⑤">Assert</a> <var>config</var>’s <a data-link-type="dfn" href="#fenced-frame-config-mapped-url" id="ref-for-fenced-frame-config-mapped-url①">mapped url</a>'s <a data-link-type="dfn" href="#mapped-url-value" id="ref-for-mapped-url-value①">value</a> is a <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url" id="ref-for-concept-url③">URL</a> whose <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-scheme" id="ref-for-concept-url-scheme①">scheme</a> is "<code>https</code>".</p>
+        <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#assert" id="ref-for-assert⑥">Assert</a> <var>config</var>’s <a data-link-type="dfn" href="#fenced-frame-config-mapped-url" id="ref-for-fenced-frame-config-mapped-url①">mapped url</a>'s <a data-link-type="dfn" href="#mapped-url-value" id="ref-for-mapped-url-value①">value</a> is a <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url" id="ref-for-concept-url③">URL</a> whose <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-scheme" id="ref-for-concept-url-scheme①">scheme</a> is "<code>https</code>".</p>
        <li data-md>
         <p>Set <var>url</var> to <var>config</var>’s <a data-link-type="dfn" href="#fenced-frame-config-mapped-url" id="ref-for-fenced-frame-config-mapped-url②">mapped url</a>'s <a data-link-type="dfn" href="#mapped-url-value" id="ref-for-mapped-url-value②">value</a>.</p>
       </ol>
@@ -2559,16 +2647,16 @@ <h4 class="heading settled" data-level="3.7.3" id="navigation-changes"><span cla
     </details>
    </div>
    <p><br></p>
-   <p>The below patches make use of the previously-assigned <a data-link-type="dfn" href="#source-snapshot-params-fenced-frame-config" id="ref-for-source-snapshot-params-fenced-frame-config①">fenced frame
-config</a>, <a data-link-type="dfn" href="#instantiate-a-config" id="ref-for-instantiate-a-config">instantiating</a> it in preparation for use when the navigation is
+   <p>The below patches make use of the previously-assigned <a data-link-type="dfn" href="#source-snapshot-params-target-fenced-frame-config" id="ref-for-source-snapshot-params-target-fenced-frame-config②">target fenced frame
+config</a>, <a data-link-type="dfn" href="#instantiate-a-config" id="ref-for-instantiate-a-config①">instantiating</a> it in preparation for use when the navigation is
 finalized.</p>
    <div class="algorithm" data-algorithm="navigation-params-config-instance">
      Add a new <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#struct-item" id="ref-for-struct-item②⓪">item</a> to the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigation-params" id="ref-for-navigation-params">navigation params</a> <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#struct" id="ref-for-struct②③">struct</a>: 
     <dl>
      <dt data-md><dfn class="dfn-paneled" data-dfn-for="navigation params" data-dfn-type="dfn" data-noexport id="navigation-params-fenced-frame-config-instance">fenced frame config instance</dfn>
      <dd data-md>
-      <p>A <a data-link-type="dfn" href="#fenced-frame-config-instance" id="ref-for-fenced-frame-config-instance⑤">fenced frame config instance</a> or null, initially null.</p>
-      <p class="note" role="note"><span class="marker">Note:</span> This is only set for embedder-initiated <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④⑥">fencedframe</a></code> navigations, and if a new <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①⑤">Document</a></code> is created as a result of such a navigation, this member is transferred to the new <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable④⑦">fenced navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-bc" id="ref-for-nav-bc">active browsing context</a>'s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance⑦">fenced frame config instance</a> member.</p>
+      <p>A <a data-link-type="dfn" href="#fenced-frame-config-instance" id="ref-for-fenced-frame-config-instance⑦">fenced frame config instance</a> or null, initially null.</p>
+      <p class="note" role="note"><span class="marker">Note:</span> This is only set for embedder-initiated <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④⑨">fencedframe</a></code> navigations, and if a new <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①⑥">Document</a></code> is created as a result of such a navigation, this member is transferred to the new <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable④⑦">fenced navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-bc" id="ref-for-nav-bc">active browsing context</a>'s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance⑧">fenced frame config instance</a> member.</p>
     </dl>
    </div>
    <div class="algorithm" data-algorithm="create-navigation-params-config-instance">
@@ -2577,30 +2665,30 @@ <h4 class="heading settled" data-level="3.7.3" id="navigation-changes"><span cla
     <dl>
      <dt data-md><a data-link-type="dfn" href="#navigation-params-fenced-frame-config-instance" id="ref-for-navigation-params-fenced-frame-config-instance">fenced frame config instance</a>
      <dd data-md>
-      <p>If <var>sourceSnapshotParams</var>’s <a data-link-type="dfn" href="#source-snapshot-params-fenced-frame-config" id="ref-for-source-snapshot-params-fenced-frame-config②">fenced frame config</a> is null, then null;
- otherwise, the result of <a data-link-type="dfn" href="#instantiate-a-config" id="ref-for-instantiate-a-config①">instantiating</a> <var>sourceSnapshotParams</var>’s <a data-link-type="dfn" href="#source-snapshot-params-fenced-frame-config" id="ref-for-source-snapshot-params-fenced-frame-config③">fenced frame config</a>.</p>
+      <p>If <var>sourceSnapshotParams</var>’s <a data-link-type="dfn" href="#source-snapshot-params-target-fenced-frame-config" id="ref-for-source-snapshot-params-target-fenced-frame-config③">target fenced frame config</a> is null, then
+ null; otherwise, the result of <a data-link-type="dfn" href="#instantiate-a-config" id="ref-for-instantiate-a-config②">instantiating</a> <var>sourceSnapshotParams</var>’s <a data-link-type="dfn" href="#source-snapshot-params-target-fenced-frame-config" id="ref-for-source-snapshot-params-target-fenced-frame-config④">target fenced frame config</a>.</p>
     </dl>
    </div>
    <p><br></p>
    <p>Finally, the below patches make use of the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigation-params" id="ref-for-navigation-params②">navigation params</a>'s <a data-link-type="dfn" href="#navigation-params-fenced-frame-config-instance" id="ref-for-navigation-params-fenced-frame-config-instance①">fenced frame
-config instance</a>, and handle the assignment of a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context" id="ref-for-browsing-context①">browsing context</a>'s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance⑧">fenced
+config instance</a>, and handle the assignment of a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context" id="ref-for-browsing-context③">browsing context</a>'s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance⑨">fenced
 frame config instance</a> that is initiated by a navigation.</p>
-   <p class="note" role="note"><span class="marker">Note:</span> A <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context" id="ref-for-browsing-context②">browsing context</a>'s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance⑨">fenced frame config instance</a> is assigned in two
-different ways: (1) during embedder-initiated <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④⑦">fencedframe</a></code> navigation, as described by the rest
-of this section, and (2) inherited during initial <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①⑥">Document</a></code> creation for <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①⑦">Document</a></code>s in <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable⑧">child
+   <p class="note" role="note"><span class="marker">Note:</span> A <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context" id="ref-for-browsing-context④">browsing context</a>'s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance①⓪">fenced frame config instance</a> is assigned in two
+different ways: (1) during embedder-initiated <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤⓪">fencedframe</a></code> navigation, as described by the rest
+of this section, and (2) inherited during initial <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①⑦">Document</a></code> creation for <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①⑧">Document</a></code>s in <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable⑧">child
 navigables</a> whose <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-traversable" id="ref-for-nav-traversable③">traversable navigable</a> is a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable④⑧">fenced
 navigable</a>, as handled in the <a href="#creating-browsing-contexts-patch">§ 3.2 Modifications to creating browsing contexts</a> section.</p>
-   <p>For any successful navigation inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④⑧">fencedframe</a></code>, regardless of whether it was initiated by
-content in the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe④⑨">fencedframe</a></code> or its embedder, exactly one of two things will happen:</p>
+   <p>For any successful navigation inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤①">fencedframe</a></code>, regardless of whether it was initiated by
+content in the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤②">fencedframe</a></code> or its embedder, exactly one of two things will happen:</p>
    <ul>
     <li data-md>
      <p><i>Embedder-initiated navigations</i>: The <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigation-params" id="ref-for-navigation-params③">navigation params</a>'s <a data-link-type="dfn" href="#navigation-params-fenced-frame-config-instance" id="ref-for-navigation-params-fenced-frame-config-instance②">fenced
- frame config instance</a> will be unconditionally assigned to the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤⓪">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-containers" id="ref-for-fenced-navigable-containers①②">fenced
+ frame config instance</a> will be unconditionally assigned to the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤③">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-containers" id="ref-for-fenced-navigable-containers①②">fenced
  navigable container</a>'s <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable④⑨">fenced navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-bc" id="ref-for-nav-bc①">active
- browsing context</a>'s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance①⓪">fenced frame config instance</a>.</p>
+ browsing context</a>'s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance①①">fenced frame config instance</a>.</p>
     <li data-md>
-     <p><i>Inner-content-initiated navigations</i>: The <a data-link-type="dfn" href="#fenced-frame-config-instance" id="ref-for-fenced-frame-config-instance⑥">fenced frame config instance</a> referenced in
- the immediately-preceding point persists through this kind of cross-<code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①⑧">Document</a></code> navigation.</p>
+     <p><i>Inner-content-initiated navigations</i>: The <a data-link-type="dfn" href="#fenced-frame-config-instance" id="ref-for-fenced-frame-config-instance⑧">fenced frame config instance</a> referenced in
+ the immediately-preceding point persists through this kind of cross-<code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①⑨">Document</a></code> navigation.</p>
    </ul>
    <div class="algorithm" data-algorithm="create-and-initialize-document-patch">
      Modify <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#initialise-the-document-object" id="ref-for-initialise-the-document-object">create and initialize a Document object</a> algorithm to insert one step after
@@ -2610,20 +2698,20 @@ <h4 class="heading settled" data-level="3.7.3" id="navigation-changes"><span cla
       <p>If <var>navigationParams</var>’s <a data-link-type="dfn" href="#navigation-params-fenced-frame-config-instance" id="ref-for-navigation-params-fenced-frame-config-instance③">fenced frame config instance</a> is not null:</p>
       <ol>
        <li data-md>
-        <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#assert" id="ref-for-assert⑥">Assert</a>: <var>browsingContext</var> does not equal <var>navigationParams</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigation-params-navigable" id="ref-for-navigation-params-navigable①">navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-bc" id="ref-for-nav-bc②">active browsing context</a>.</p>
+        <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#assert" id="ref-for-assert⑦">Assert</a>: <var>browsingContext</var> does not equal <var>navigationParams</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigation-params-navigable" id="ref-for-navigation-params-navigable①">navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-bc" id="ref-for-nav-bc②">active browsing context</a>.</p>
         <p class="note" role="note"><span class="marker">Note:</span> This is because embedder-initiated navigations (indicated by <var>navigationParams</var>’s <a data-link-type="dfn" href="#navigation-params-fenced-frame-config-instance" id="ref-for-navigation-params-fenced-frame-config-instance④">fenced frame config instance</a> being non-null) always cause a <a href="#bcg-swap">§ 3.7.4 Browsing context group swap</a>.</p>
        <li data-md>
-        <p>Set <var>browsingContext</var>’s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance①①">fenced frame config instance</a> to <var>navigationParams</var>’s <a data-link-type="dfn" href="#navigation-params-fenced-frame-config-instance" id="ref-for-navigation-params-fenced-frame-config-instance⑤">fenced frame config instance</a>.</p>
+        <p>Set <var>browsingContext</var>’s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance①②">fenced frame config instance</a> to <var>navigationParams</var>’s <a data-link-type="dfn" href="#navigation-params-fenced-frame-config-instance" id="ref-for-navigation-params-fenced-frame-config-instance⑤">fenced frame config instance</a>.</p>
       </ol>
     </ol>
    </div>
    <p><span class="XXX">TODO: Call the <a data-link-type="dfn" href="#fenced-frame-config-instance-on-navigate-callback" id="ref-for-fenced-frame-config-instance-on-navigate-callback①">on navigate callback</a> at the
 appropriate time.</span></p>
    <h4 class="heading settled" data-level="3.7.4" id="bcg-swap"><span class="secno">3.7.4. </span><span class="content">Browsing context group swap</span><a class="self-link" href="#bcg-swap"></a></h4>
-   <p>When the embedder of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤①">fencedframe</a></code> initiates navigations inside the frame, we must perform a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context-group" id="ref-for-browsing-context-group⑦">browsing context group</a> swap to entirely reset the context inside the frame, to ensure nothing is
-left over to be leaked to the next <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document①⑨">Document</a></code>.</p>
+   <p>When the embedder of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤④">fencedframe</a></code> initiates navigations inside the frame, we must perform a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context-group" id="ref-for-browsing-context-group⑦">browsing context group</a> swap to entirely reset the context inside the frame, to ensure nothing is
+left over to be leaked to the next <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②⓪">Document</a></code>.</p>
    <div class="algorithm" data-algorithm="attempt-populate-history-bcg-swap">
-     Modify <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#attempt-to-populate-the-history-entry&apos;s-document" id="ref-for-attempt-to-populate-the-history-entry&apos;s-document①">attempt to populate the history entry’s document</a> algorithm. Add a step
+     Modify <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#attempt-to-populate-the-history-entry&apos;s-document" id="ref-for-attempt-to-populate-the-history-entry&apos;s-document②">attempt to populate the history entry’s document</a> algorithm. Add a step
   before the step that reads "6. <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#queue-a-global-task" id="ref-for-queue-a-global-task">Queue a global task</a> on the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#navigation-and-traversal-task-source" id="ref-for-navigation-and-traversal-task-source">navigation and traversal task
   source</a>", that reads: 
     <ol start="6">
@@ -2637,7 +2725,7 @@ <h4 class="heading settled" data-level="3.7.4" id="bcg-swap"><span class="secno"
        <li data-md>
         <p><var>navigationParams</var> is non-null</p>
       </ul>
-      <p>then set <var>navigationParams</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigation-params-coop-enforcement-result" id="ref-for-navigation-params-coop-enforcement-result">COOP enforcement result</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#coop-enforcement-bcg-switch" id="ref-for-coop-enforcement-bcg-switch">needs a browsing context group switch</a> <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean④">boolean</a> to true.</p>
+      <p>then set <var>navigationParams</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigation-params-coop-enforcement-result" id="ref-for-navigation-params-coop-enforcement-result">COOP enforcement result</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#coop-enforcement-bcg-switch" id="ref-for-coop-enforcement-bcg-switch">needs a browsing context group switch</a> <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean⑤">boolean</a> to true.</p>
       <p class="issue" id="issue-65d90823"><a class="self-link" href="#issue-65d90823"></a> This indeed works, but we should consider using a separate mechanism to carry this out,
  instead of piggybacking off of the COOP mechanism which was designed without fenced frames in
  mind, and could evolve in ways that give this specification unwanted side-effects.</p>
@@ -2645,10 +2733,10 @@ <h4 class="heading settled" data-level="3.7.4" id="bcg-swap"><span class="secno"
    </div>
    <h3 class="heading settled" data-level="3.8" id="page-visibility"><span class="secno">3.8. </span><span class="content">Page visibility</span><a class="self-link" href="#page-visibility"></a></h3>
    <p>The <a href="https://html.spec.whatwg.org/#page-visibility">Page visibility</a> section of <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> is
-modified such that the first step of the algorithm that runs when a user-agent changes a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①⑦">traversable navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#system-visibility-state" id="ref-for-system-visibility-state">system visibility state</a> calls the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#inclusive-descendant-navigables" id="ref-for-inclusive-descendant-navigables③">inclusive descendant
+modified such that the first step of the algorithm that runs when a user-agent changes a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#traversable-navigable" id="ref-for-traversable-navigable①⑧">traversable navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#system-visibility-state" id="ref-for-system-visibility-state">system visibility state</a> calls the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#inclusive-descendant-navigables" id="ref-for-inclusive-descendant-navigables③">inclusive descendant
 navigables</a> algorithm with <a data-link-type="dfn" href="#inclusive-dn-unfenced" id="ref-for-inclusive-dn-unfenced②">unfenced</a> set to true.</p>
    <h2 class="heading settled" data-level="4" id="interaction-with-other-specs"><span class="secno">4. </span><span class="content">Interactions with other specifications</span><a class="self-link" href="#interaction-with-other-specs"></a></h2>
-   <p>Due to the necessarily cross-cutting nature of the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤②">fencedframe</a></code> element and its interactions with
+   <p>Due to the necessarily cross-cutting nature of the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤⑤">fencedframe</a></code> element and its interactions with
 core concepts like <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable①①">navigable</a> and <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context-group" id="ref-for-browsing-context-group⑧">browsing context group</a>, there are a number of
 specifications that rely on terms whose usages must be re-evaluated in light of this specification;
 this section houses the various changes that we propose to other specifications.</p>
@@ -2658,7 +2746,7 @@ <h3 class="heading settled" data-level="4.1" id="prerendering-monkeypatch"><span
    <dl>
     <dt data-md>"<code>fencedframe</code>"
     <dd data-md>
-     <p>This <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable①③">navigable</a> is displaying a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤③">fencedframe</a></code>'s content</p>
+     <p>This <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable" id="ref-for-navigable①③">navigable</a> is displaying a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤⑥">fencedframe</a></code>'s content</p>
    </dl>
    <p class="issue" id="issue-d22ed66a"><a class="self-link" href="#issue-d22ed66a"></a> Specify the behavior that leads to the following:</p>
    <details class="wpt-tests-block" dir="ltr" lang="en" open>
@@ -2669,18 +2757,18 @@ <h3 class="heading settled" data-level="4.1" id="prerendering-monkeypatch"><span
    </details>
    <h3 class="heading settled" data-level="4.2" id="csp-integration"><span class="secno">4.2. </span><span class="content">Content Security Policy</span><a class="self-link" href="#csp-integration"></a></h3>
    <p><em>This introductory section is non-normative</em>.</p>
-   <p>Content Security Policy <a data-link-type="biblio" href="#biblio-csp" title="Content Security Policy Level 3">[CSP]</a> can ordinarily be used by web content associated with a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②⓪">Document</a></code> that hosts a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable-container" id="ref-for-navigable-container⑥">navigable container</a> to limit the source of navigations in a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable⑨">child
+   <p>Content Security Policy <a data-link-type="biblio" href="#biblio-csp" title="Content Security Policy Level 3">[CSP]</a> can ordinarily be used by web content associated with a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②①">Document</a></code> that hosts a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable-container" id="ref-for-navigable-container⑥">navigable container</a> to limit the source of navigations in a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#child-navigable" id="ref-for-child-navigable⑨">child
 navigable</a>.</p>
    <p>In order to prevent <a data-link-type="biblio" href="#biblio-csp" title="Content Security Policy Level 3">[CSP]</a> from being used a communication side-channel exposing the <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url" id="ref-for-concept-url④">URL</a> of
-navigations inside a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤④">fencedframe</a></code> to the site operating its embedder, the only <a data-link-type="dfn" href="https://w3c.github.io/webappsec-csp/#source-expression" id="ref-for-source-expression">source
-expressions</a> that can influence a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤⑤">fencedframe</a></code> navigation are:</p>
+navigations inside a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤⑦">fencedframe</a></code> to the site operating its embedder, the only <a data-link-type="dfn" href="https://w3c.github.io/webappsec-csp/#source-expression" id="ref-for-source-expression">source
+expressions</a> that can influence a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤⑧">fencedframe</a></code> navigation are:</p>
    <ul>
     <li data-md>
      <p>The <a data-link-type="grammar" href="https://w3c.github.io/webappsec-csp/#grammardef-scheme-source" id="ref-for-grammardef-scheme-source">scheme-source</a> "<code>https:</code>"</p>
     <li data-md>
      <p>The <a data-link-type="grammar" href="https://w3c.github.io/webappsec-csp/#grammardef-host-source" id="ref-for-grammardef-host-source">host-source</a> "<code>https://*:*</code>"</p>
     <li data-md>
-     <p>The <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#string" id="ref-for-string①④">string</a> "<code>*</code>"</p>
+     <p>The <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#string" id="ref-for-string①⑤">string</a> "<code>*</code>"</p>
    </ul>
    <p>See our <a href="https://github.com/WICG/fenced-frame/blob/master/explainer/interaction_with_content_security_policy.md#proposal---scheme-source-matching">CSP
 explainer</a> that describes this.</p>
@@ -2711,9 +2799,9 @@ <h4 class="heading settled" data-level="4.2.1" id="csp-algorithms"><span class="
     </ol>
    </div>
    <h4 class="heading settled" data-level="4.2.2" id="new-csp-directive"><span class="secno">4.2.2. </span><span class="content">New fenced-frame-src <a data-link-type="biblio" href="#biblio-csp" title="Content Security Policy Level 3">[CSP]</a> <a data-link-type="dfn" href="https://w3c.github.io/webappsec-csp/#directives" id="ref-for-directives">directive</a></span><a class="self-link" href="#new-csp-directive"></a></h4>
-   <p>Since <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤⑥">fencedframe</a></code> is a different element than <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element⑧">iframe</a></code>, using the <b><i><a data-link-type="dfn" href="https://w3c.github.io/webappsec-csp/#frame-src" id="ref-for-frame-src">frame-src</a></i></b> directive wouldn’t give web sites enough control over their CSP rules. Introduce a new <a data-link-type="biblio" href="#biblio-csp" title="Content Security Policy Level 3">[CSP]</a> <a data-link-type="dfn" href="https://w3c.github.io/webappsec-csp/#directives" id="ref-for-directives①">directive</a>: <b><i>fenced-frame-src</i></b>. The monkey-patched specification is printed below:</p>
+   <p>Since <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤⑨">fencedframe</a></code> is a different element than <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element⑧">iframe</a></code>, using the <b><i><a data-link-type="dfn" href="https://w3c.github.io/webappsec-csp/#frame-src" id="ref-for-frame-src">frame-src</a></i></b> directive wouldn’t give web sites enough control over their CSP rules. Introduce a new <a data-link-type="biblio" href="#biblio-csp" title="Content Security Policy Level 3">[CSP]</a> <a data-link-type="dfn" href="https://w3c.github.io/webappsec-csp/#directives" id="ref-for-directives①">directive</a>: <b><i>fenced-frame-src</i></b>. The monkey-patched specification is printed below:</p>
    <div class="algorithm" data-algorithm="fenced-frame-src">
-     The <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="fenced-frame-src">fenced-frame-src</dfn> directive restricts the URLs which may be loaded into a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤⑦">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable⑤①">fenced navigable</a>. The syntax for the directive’s
+     The <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="fenced-frame-src">fenced-frame-src</dfn> directive restricts the URLs which may be loaded into a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥⓪">fencedframe</a></code>'s <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable⑤①">fenced navigable</a>. The syntax for the directive’s
   name and value is described by the following ABNF: 
 <pre>directive-name  = "fenced-frame-src"
 directive-value = <a data-link-type="grammar" href="https://w3c.github.io/webappsec-csp/#grammardef-serialized-source-list" id="ref-for-grammardef-serialized-source-list">serialized-source-list</a>
@@ -2787,67 +2875,67 @@ <h4 class="heading settled" data-level="4.2.2" id="new-csp-directive"><span clas
    </details>
    <h3 class="heading settled" data-level="4.3" id="permissions-policy-changes"><span class="secno">4.3. </span><span class="content">Permissions Policies</span><a class="self-link" href="#permissions-policy-changes"></a></h3>
    <p><em>This introductory sub-section is non-normative.</em></p>
-   <p>The <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature④">policy-controlled features</a> available to <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②①">Document</a></code>s inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤⑧">fencedframe</a></code> are
-determined exclusively by the <code class="idl"><a data-link-type="idl" href="#fencedframeconfig" id="ref-for-fencedframeconfig①④">FencedFrameConfig</a></code> that the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑤⑨">fencedframe</a></code> navigates to.
-Specifically, the <code class="idl"><a data-link-type="idl" href="#fencedframeconfig" id="ref-for-fencedframeconfig①⑤">FencedFrameConfig</a></code>'s <a data-link-type="dfn" href="#fencedframeconfig-config" id="ref-for-fencedframeconfig-config①①">config</a>'s <a data-link-type="dfn" href="#fenced-frame-config-effective-enabled-permissions" id="ref-for-fenced-frame-config-effective-enabled-permissions②">effective enabled permissions</a> defines the exclusive list of <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature⑤">policy-controlled features</a> that will be enabled in the <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②②">Document</a></code> (all others will be disabled).</p>
-   <p>During navigation, the <code class="idl"><a data-link-type="idl" href="#fencedframeconfig" id="ref-for-fencedframeconfig①⑥">FencedFrameConfig</a></code>'s <a data-link-type="dfn" href="#fencedframeconfig-config" id="ref-for-fencedframeconfig-config①②">config</a> <a data-link-type="dfn" href="#instantiate-a-config" id="ref-for-instantiate-a-config②">instantiates</a> a <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance①②">fenced frame config instance</a> that is stored on the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context" id="ref-for-browsing-context③">browsing context</a> in the <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable⑤②">fenced navigable</a>. This browsing context’s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance①③">fenced frame config instance</a>'s <a data-link-type="dfn" href="#fenced-frame-config-instance-effective-enabled-permissions" id="ref-for-fenced-frame-config-instance-effective-enabled-permissions①">effective enabled
-permissions</a> is consulted <a data-link-type="dfn" href="#should-navigation-response-to-navigation-request-be-blocked-by-permissions-policy" id="ref-for-should-navigation-response-to-navigation-request-be-blocked-by-permissions-policy">during navigation</a>. A <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥⓪">fencedframe</a></code> navigation can only succeed if the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/dom.html#concept-document-permissions-policy" id="ref-for-concept-document-permissions-policy②">permissions policy</a> for the navigation’s resulting <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②③">Document</a></code> has an <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#inherited-policy" id="ref-for-inherited-policy②">inherited policy</a> such that the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#inherited-policy-for-a-feature" id="ref-for-inherited-policy-for-a-feature①">inherited policy value</a> is
+   <p>The <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature④">policy-controlled features</a> available to <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②②">Document</a></code>s inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥①">fencedframe</a></code> are
+determined exclusively by the <code class="idl"><a data-link-type="idl" href="#fencedframeconfig" id="ref-for-fencedframeconfig①④">FencedFrameConfig</a></code> that the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥②">fencedframe</a></code> navigates to.
+Specifically, the <code class="idl"><a data-link-type="idl" href="#fencedframeconfig" id="ref-for-fencedframeconfig①⑤">FencedFrameConfig</a></code>'s <a data-link-type="dfn" href="#fencedframeconfig-config" id="ref-for-fencedframeconfig-config①①">config</a>'s <a data-link-type="dfn" href="#fenced-frame-config-effective-enabled-permissions" id="ref-for-fenced-frame-config-effective-enabled-permissions②">effective enabled permissions</a> defines the exclusive list of <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature⑤">policy-controlled features</a> that will be enabled in the <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②③">Document</a></code> (all others will be disabled).</p>
+   <p>During navigation, the <code class="idl"><a data-link-type="idl" href="#fencedframeconfig" id="ref-for-fencedframeconfig①⑥">FencedFrameConfig</a></code>'s <a data-link-type="dfn" href="#fencedframeconfig-config" id="ref-for-fencedframeconfig-config①②">config</a> <a data-link-type="dfn" href="#instantiate-a-config" id="ref-for-instantiate-a-config③">instantiates</a> a <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance①③">fenced frame config instance</a> that is stored on the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#browsing-context" id="ref-for-browsing-context⑤">browsing context</a> in the <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable⑤②">fenced navigable</a>. This browsing context’s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance①④">fenced frame config instance</a>'s <a data-link-type="dfn" href="#fenced-frame-config-instance-effective-enabled-permissions" id="ref-for-fenced-frame-config-instance-effective-enabled-permissions①">effective enabled
+permissions</a> is consulted <a data-link-type="dfn" href="#should-navigation-response-to-navigation-request-be-blocked-by-permissions-policy" id="ref-for-should-navigation-response-to-navigation-request-be-blocked-by-permissions-policy">during navigation</a>. A <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥③">fencedframe</a></code> navigation can only succeed if the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/dom.html#concept-document-permissions-policy" id="ref-for-concept-document-permissions-policy②">permissions policy</a> for the navigation’s resulting <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②④">Document</a></code> has an <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#inherited-policy" id="ref-for-inherited-policy②">inherited policy</a> such that the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#inherited-policy-for-a-feature" id="ref-for-inherited-policy-for-a-feature①">inherited policy value</a> is
 "<code>Enabled</code>" for each feature in the <a data-link-type="dfn" href="#fenced-frame-config-effective-enabled-permissions" id="ref-for-fenced-frame-config-effective-enabled-permissions③">effective enabled permissions</a>. Otherwise
-the environment the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥①">fencedframe</a></code> is embedded in is deemed unsuitable for the <a data-link-type="dfn" href="#fenced-frame-config" id="ref-for-fenced-frame-config②⓪">fenced frame
+the environment the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥④">fencedframe</a></code> is embedded in is deemed unsuitable for the <a data-link-type="dfn" href="#fenced-frame-config" id="ref-for-fenced-frame-config②①">fenced frame
 config</a>, and the navigation is blocked.</p>
-   <p>At the same time, to make sure that a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥②">fencedframe</a></code>'s embedder does not directly influence content
+   <p>At the same time, to make sure that a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥⑤">fencedframe</a></code>'s embedder does not directly influence content
 in the frame based on that navigation’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigation-params-origin" id="ref-for-navigation-params-origin">origin</a> (since the origin is derived
 from cross-site data), this specification modifies various <a data-link-type="biblio" href="#biblio-permissions-policy" title="Permissions Policy">[PERMISSIONS-POLICY]</a> algorithms such
-that a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥③">fencedframe</a></code> <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②④">Document</a></code>'s <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#inherited-policy" id="ref-for-inherited-policy③">inherited policy</a> is computed without
-consideration of whether its <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigation-params-origin" id="ref-for-navigation-params-origin①">origin</a> is <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#same-origin" id="ref-for-same-origin④">same origin</a> with its embedder’s.
-Therefore a feature can only be enabled inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥④">fencedframe</a></code> if its embedder <em>explicitly</em> delegates it via <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#the-special-value" id="ref-for-the-special-value">the special value *</a> <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#allowlist" id="ref-for-allowlist">allowlist</a>.</p>
+that a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥⑥">fencedframe</a></code> <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②⑤">Document</a></code>'s <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#inherited-policy" id="ref-for-inherited-policy③">inherited policy</a> is computed without
+consideration of whether its <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigation-params-origin" id="ref-for-navigation-params-origin①">origin</a> is <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#same-origin" id="ref-for-same-origin⑤">same origin</a> with its embedder’s.
+Therefore a feature can only be enabled inside of a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥⑦">fencedframe</a></code> if its embedder <em>explicitly</em> delegates it via <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#the-special-value" id="ref-for-the-special-value">the special value *</a> <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#allowlist" id="ref-for-allowlist">allowlist</a>.</p>
    <p>Considering all of the above, we get the following interesting implications:</p>
    <ul>
     <li data-md>
      <p>If a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature⑥">feature</a> that <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-contain" id="ref-for-list-contain⑤">exists</a> in the <a data-link-type="dfn" href="#fenced-frame-config-effective-enabled-permissions" id="ref-for-fenced-frame-config-effective-enabled-permissions④">effective enabled permissions</a> has a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature-default-allowlist" id="ref-for-policy-controlled-feature-default-allowlist">default allowlist</a> of <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#the-special-value" id="ref-for-the-special-value①">the special value *</a>, and no `<a data-link-type="http-header" href="https://w3c.github.io/webappsec-permissions-policy/#permissions-policy-header" id="ref-for-permissions-policy-header"><code>Permissions-Policy</code></a>` header is served on
- the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥⑤">fencedframe</a></code> embedder, and the <code><a data-link-type="element-sub" href="#element-attrdef-fencedframe-allow" id="ref-for-element-attrdef-fencedframe-allow①">allow</a></code> attribute is empty, the navigation
- inside the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥⑥">fencedframe</a></code> will succeed, and the resulting <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②⑤">Document</a></code> will be <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#allowed-to-use" id="ref-for-allowed-to-use">allowed to
+ the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥⑧">fencedframe</a></code> embedder, and the <code><a data-link-type="element-sub" href="#element-attrdef-fencedframe-allow" id="ref-for-element-attrdef-fencedframe-allow①">allow</a></code> attribute is empty, the navigation
+ inside the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥⑨">fencedframe</a></code> will succeed, and the resulting <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②⑥">Document</a></code> will be <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#allowed-to-use" id="ref-for-allowed-to-use">allowed to
  use</a> the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature⑦">feature</a> (i.e., it will be enabled).</p>
     <li data-md>
      <p>If a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature⑧">feature</a> that <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-contain" id="ref-for-list-contain⑥">exists</a> in the <a data-link-type="dfn" href="#fenced-frame-config-effective-enabled-permissions" id="ref-for-fenced-frame-config-effective-enabled-permissions⑤">effective enabled permissions</a> has a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature-default-allowlist" id="ref-for-policy-controlled-feature-default-allowlist①">default allowlist</a> of <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#default-allowlist-self" id="ref-for-default-allowlist-self"><code>'self'</code></a>, and no `<a data-link-type="http-header" href="https://w3c.github.io/webappsec-permissions-policy/#permissions-policy-header" id="ref-for-permissions-policy-header①"><code>Permissions-Policy</code></a>`
- header is served on the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥⑦">fencedframe</a></code> embedder, and the <code><a data-link-type="element-sub" href="#element-attrdef-fencedframe-allow" id="ref-for-element-attrdef-fencedframe-allow②">allow</a></code> attribute is
- empty, the navigation inside the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥⑧">fencedframe</a></code> will be blocked.</p>
+ header is served on the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦⓪">fencedframe</a></code> embedder, and the <code><a data-link-type="element-sub" href="#element-attrdef-fencedframe-allow" id="ref-for-element-attrdef-fencedframe-allow②">allow</a></code> attribute is
+ empty, the navigation inside the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦①">fencedframe</a></code> will be blocked.</p>
      <p class="note" role="note"><span class="marker">Note:</span> This is because ordinarily this <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature⑨">feature</a> would only be enabled
- if the subframe’s <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②⑥">Document</a></code> was <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#same-origin" id="ref-for-same-origin⑤">same origin</a> with its embedder, a check this specification
- avoids for fenced frames, since the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑥⑨">fencedframe</a></code>s <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②⑦">Document</a></code>'s <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-document-origin" id="ref-for-concept-document-origin②">origin</a> is
+ if the subframe’s <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②⑦">Document</a></code> was <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#same-origin" id="ref-for-same-origin⑥">same origin</a> with its embedder, a check this specification
+ avoids for fenced frames, since the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦②">fencedframe</a></code>s <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②⑧">Document</a></code>'s <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-document-origin" id="ref-for-concept-document-origin②">origin</a> is
  derived from cross-site data. Therefore, we simply "fail close".</p>
     <li data-md>
-     <p>If a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature①⓪">feature</a> that <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-contain" id="ref-for-list-contain⑦">exists</a> in the <a data-link-type="dfn" href="#fenced-frame-config-effective-enabled-permissions" id="ref-for-fenced-frame-config-effective-enabled-permissions⑥">effective enabled permissions</a> has a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature-default-allowlist" id="ref-for-policy-controlled-feature-default-allowlist②">default allowlist</a> of <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#default-allowlist-self" id="ref-for-default-allowlist-self①"><code>'self'</code></a>, and the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦⓪">fencedframe</a></code>'s <code><a data-link-type="element-sub" href="#element-attrdef-fencedframe-allow" id="ref-for-element-attrdef-fencedframe-allow③">allow</a></code> attribute contains the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature①①">feature</a> but no <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#allowlist" id="ref-for-allowlist①">allowlist</a>, the rules
+     <p>If a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature①⓪">feature</a> that <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-contain" id="ref-for-list-contain⑦">exists</a> in the <a data-link-type="dfn" href="#fenced-frame-config-effective-enabled-permissions" id="ref-for-fenced-frame-config-effective-enabled-permissions⑥">effective enabled permissions</a> has a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature-default-allowlist" id="ref-for-policy-controlled-feature-default-allowlist②">default allowlist</a> of <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#default-allowlist-self" id="ref-for-default-allowlist-self①"><code>'self'</code></a>, and the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦③">fencedframe</a></code>'s <code><a data-link-type="element-sub" href="#element-attrdef-fencedframe-allow" id="ref-for-element-attrdef-fencedframe-allow③">allow</a></code> attribute contains the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature①①">feature</a> but no <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#allowlist" id="ref-for-allowlist①">allowlist</a>, the rules
  described in <a href="allow-attribute-fenced-frame">The <code>allow</code> attribute section</a>, the default <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#allowlist" id="ref-for-allowlist②">allowlist</a> for the feature will be <code>'src'</code> which is meant to represent the embedder-supplied
- navigation <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url" id="ref-for-concept-url⑤">URL</a>, for which there is none when navigating a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦①">fencedframe</a></code>, as the navigation <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url" id="ref-for-concept-url⑥">URL</a> is determined by the <a data-link-type="dfn" href="#fenced-frame-config" id="ref-for-fenced-frame-config②①">fenced frame config</a>. The navigation will be blocked.</p>
+ navigation <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url" id="ref-for-concept-url⑤">URL</a>, for which there is none when navigating a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦④">fencedframe</a></code>, as the navigation <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url" id="ref-for-concept-url⑥">URL</a> is determined by the <a data-link-type="dfn" href="#fenced-frame-config" id="ref-for-fenced-frame-config②②">fenced frame config</a>. The navigation will be blocked.</p>
     <li data-md>
-     <p>If a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature①②">feature</a> that <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-contain" id="ref-for-list-contain⑧">exists</a> in the <a data-link-type="dfn" href="#fenced-frame-config-effective-enabled-permissions" id="ref-for-fenced-frame-config-effective-enabled-permissions⑦">effective enabled permissions</a> has a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature-default-allowlist" id="ref-for-policy-controlled-feature-default-allowlist③">default allowlist</a> of <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#default-allowlist-self" id="ref-for-default-allowlist-self②"><code>'self'</code></a> but either the `<a data-link-type="http-header" href="https://w3c.github.io/webappsec-permissions-policy/#permissions-policy-header" id="ref-for-permissions-policy-header②"><code>Permissions-Policy</code></a>` header served on the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦②">fencedframe</a></code>'s embedder <em>OR</em> the <code><a data-link-type="element-sub" href="#element-attrdef-fencedframe-allow" id="ref-for-element-attrdef-fencedframe-allow④">allow</a></code> attribute sets that <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature①③">feature</a>'s <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#allowlist" id="ref-for-allowlist③">allowlist</a> to <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#the-special-value" id="ref-for-the-special-value②">the special value *</a>, then the navigation inside the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦③">fencedframe</a></code> will succeed, and the
- resulting <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②⑧">Document</a></code> is <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#allowed-to-use" id="ref-for-allowed-to-use①">allowed to use</a> the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature①④">feature</a>.</p>
+     <p>If a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature①②">feature</a> that <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-contain" id="ref-for-list-contain⑧">exists</a> in the <a data-link-type="dfn" href="#fenced-frame-config-effective-enabled-permissions" id="ref-for-fenced-frame-config-effective-enabled-permissions⑦">effective enabled permissions</a> has a <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature-default-allowlist" id="ref-for-policy-controlled-feature-default-allowlist③">default allowlist</a> of <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#default-allowlist-self" id="ref-for-default-allowlist-self②"><code>'self'</code></a> but either the `<a data-link-type="http-header" href="https://w3c.github.io/webappsec-permissions-policy/#permissions-policy-header" id="ref-for-permissions-policy-header②"><code>Permissions-Policy</code></a>` header served on the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦⑤">fencedframe</a></code>'s embedder <em>OR</em> the <code><a data-link-type="element-sub" href="#element-attrdef-fencedframe-allow" id="ref-for-element-attrdef-fencedframe-allow④">allow</a></code> attribute sets that <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature①③">feature</a>'s <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#allowlist" id="ref-for-allowlist③">allowlist</a> to <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#the-special-value" id="ref-for-the-special-value②">the special value *</a>, then the navigation inside the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦⑥">fencedframe</a></code> will succeed, and the
+ resulting <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②⑨">Document</a></code> is <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#allowed-to-use" id="ref-for-allowed-to-use①">allowed to use</a> the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature" id="ref-for-policy-controlled-feature①④">feature</a>.</p>
     <li data-md>
-     <p>If a navigation inside a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦④">fencedframe</a></code> would otherwise succeed, but the <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#concept-response" id="ref-for-concept-response①">response</a> on the
- navigation inside the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦⑤">fencedframe</a></code> is served with a `<a data-link-type="http-header" href="https://w3c.github.io/webappsec-permissions-policy/#permissions-policy-header" id="ref-for-permissions-policy-header③"><code>Permissions-Policy</code></a>` header that sets the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#allowlist" id="ref-for-allowlist④">allowlist</a> to "<code>none</code>" or an
- otherwise incompatible <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#concept-origin" id="ref-for-concept-origin③">origin</a> for a feature in the <a data-link-type="dfn" href="#fenced-frame-config-effective-enabled-permissions" id="ref-for-fenced-frame-config-effective-enabled-permissions⑧">effective enabled
- permissions</a>, the navigation still succeeds, but the <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document②⑨">Document</a></code> in the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦⑥">fencedframe</a></code> is <strong>not</strong> <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#allowed-to-use" id="ref-for-allowed-to-use②">allowed to use</a> the feature.</p>
-     <p class="note" role="note"><span class="marker">Note:</span> This is OK because it is the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦⑦">fencedframe</a></code>'s content <em>itself</em> that is making the decision
+     <p>If a navigation inside a <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦⑦">fencedframe</a></code> would otherwise succeed, but the <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#concept-response" id="ref-for-concept-response①">response</a> on the
+ navigation inside the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦⑧">fencedframe</a></code> is served with a `<a data-link-type="http-header" href="https://w3c.github.io/webappsec-permissions-policy/#permissions-policy-header" id="ref-for-permissions-policy-header③"><code>Permissions-Policy</code></a>` header that sets the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#allowlist" id="ref-for-allowlist④">allowlist</a> to "<code>none</code>" or an
+ otherwise incompatible <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#concept-origin" id="ref-for-concept-origin④">origin</a> for a feature in the <a data-link-type="dfn" href="#fenced-frame-config-effective-enabled-permissions" id="ref-for-fenced-frame-config-effective-enabled-permissions⑧">effective enabled
+ permissions</a>, the navigation still succeeds, but the <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③⓪">Document</a></code> in the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦⑨">fencedframe</a></code> is <strong>not</strong> <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#allowed-to-use" id="ref-for-allowed-to-use②">allowed to use</a> the feature.</p>
+     <p class="note" role="note"><span class="marker">Note:</span> This is OK because it is the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑧⓪">fencedframe</a></code>'s content <em>itself</em> that is making the decision
  to disable a particular feature, not its embedder environment.</p>
    </ul>
    <p>The patches in the below section "fence" the appropriate <a data-link-type="biblio" href="#biblio-permissions-policy" title="Permissions Policy">[PERMISSIONS-POLICY]</a> and <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a> algorithms to achieve the outcomes described in the above explanatory content.</p>
    <h4 class="heading settled" data-level="4.3.1" id="permissions-policy-patches"><span class="secno">4.3.1. </span><span class="content">Algorithm patches</span><a class="self-link" href="#permissions-policy-patches"></a></h4>
    <div class="algorithm" data-algorithm="allow-attribute-fenced-frame" id="allow-attribute-fenced-frame">
      Rename the <a href="https://w3c.github.io/webappsec-permissions-policy/#iframe-allow-attribute">The <code>allow</code> attribute of the <code>iframe</code> element</a> section to "The <code>allow</code> attribute of the <code>iframe</code> and <code>fencedframe</code> element", and rewrite the section to read: 
-    <p><code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element⑨">iframe</a></code> and <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦⑧">fencedframe</a></code> elements have an respective <code>allow</code> attributes (<code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element①⓪">iframe</a></code>: <code><a data-link-type="element-sub" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#attr-iframe-allow" id="ref-for-attr-iframe-allow">allow</a></code>; <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑦⑨">fencedframe</a></code>: <code><a data-link-type="element-sub" href="#element-attrdef-fencedframe-allow" id="ref-for-element-attrdef-fencedframe-allow⑤">allow</a></code>), which contain an <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#serialized-policy-directive" id="ref-for-serialized-policy-directive">ASCII-serialized
+    <p><code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element⑨">iframe</a></code> and <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑧①">fencedframe</a></code> elements have an respective <code>allow</code> attributes (<code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element①⓪">iframe</a></code>: <code><a data-link-type="element-sub" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#attr-iframe-allow" id="ref-for-attr-iframe-allow">allow</a></code>; <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑧②">fencedframe</a></code>: <code><a data-link-type="element-sub" href="#element-attrdef-fencedframe-allow" id="ref-for-element-attrdef-fencedframe-allow⑤">allow</a></code>), which contain an <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#serialized-policy-directive" id="ref-for-serialized-policy-directive">ASCII-serialized
   policy directive</a>.</p>
     <p>The allowlist for the features named in the attribute may be empty; in that case, the default
-  value for the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#allowlist" id="ref-for-allowlist⑤">allowlist</a> is "<code>src</code>", which represents the origin of the URL in the iframe’s <code><a data-link-type="element-sub" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#attr-iframe-src" id="ref-for-attr-iframe-src">src</a></code> attribute, or the fencedframe’s <a data-link-type="dfn" href="#fenced-frame-config" id="ref-for-fenced-frame-config②②">fenced frame config</a>.</p>
-    <p>When not empty, the <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element①①">iframe</a></code>'s <code><a data-link-type="element-sub" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#attr-iframe-allow" id="ref-for-attr-iframe-allow①">allow</a></code> or <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑧⓪">fencedframe</a></code>'s <code><a data-link-type="element-sub" href="#element-attrdef-fencedframe-allow" id="ref-for-element-attrdef-fencedframe-allow⑥">allow</a></code> attribute will result in adding an <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#allowlist" id="ref-for-allowlist⑥">allowlist</a> for each <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#supported-features" id="ref-for-supported-features">supported feature</a> to the <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element①②">iframe</a></code> or <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑧①">fencedframe</a></code>'s <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#container-policy" id="ref-for-container-policy①">container policy</a>, when it is constructed.</p>
+  value for the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#allowlist" id="ref-for-allowlist⑤">allowlist</a> is "<code>src</code>", which represents the origin of the URL in the iframe’s <code><a data-link-type="element-sub" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#attr-iframe-src" id="ref-for-attr-iframe-src">src</a></code> attribute, or the fencedframe’s <a data-link-type="dfn" href="#fenced-frame-config" id="ref-for-fenced-frame-config②③">fenced frame config</a>.</p>
+    <p>When not empty, the <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element①①">iframe</a></code>'s <code><a data-link-type="element-sub" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#attr-iframe-allow" id="ref-for-attr-iframe-allow①">allow</a></code> or <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑧③">fencedframe</a></code>'s <code><a data-link-type="element-sub" href="#element-attrdef-fencedframe-allow" id="ref-for-element-attrdef-fencedframe-allow⑥">allow</a></code> attribute will result in adding an <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#allowlist" id="ref-for-allowlist⑥">allowlist</a> for each <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#supported-features" id="ref-for-supported-features">supported feature</a> to the <code><a data-link-type="element" href="https://html.spec.whatwg.org/multipage/iframe-embed-object.html#the-iframe-element" id="ref-for-the-iframe-element①②">iframe</a></code> or <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑧④">fencedframe</a></code>'s <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#container-policy" id="ref-for-container-policy①">container policy</a>, when it is constructed.</p>
    </div>
    <div class="algorithm" data-algorithm="create-permissions-policy">
      Modify the <a data-link-type="abstract-op" href="https://w3c.github.io/webappsec-permissions-policy/#create-for-navigable" id="ref-for-create-for-navigable">Create a Permissions Policy for a navigable</a> algorithm: 
-    <p>Given null or an element (<var>container</var>), an <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#concept-origin" id="ref-for-concept-origin④">origin</a> (<var>origin</var>), and an optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean⑤">boolean</a> <var>fenced</var> that defaults to false, this algorithm returns a new Permissions Policy.</p>
+    <p>Given null or an element (<var>container</var>), an <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#concept-origin" id="ref-for-concept-origin⑤">origin</a> (<var>origin</var>), and an optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean⑥">boolean</a> <var>fenced</var> that defaults to false, this algorithm returns a new Permissions Policy.</p>
     <p>Rewrite step 1 to read:</p>
     <ol>
      <li data-md>
-      <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#assert" id="ref-for-assert⑦">Assert</a>: if not null, <var>container</var> is either a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable-container" id="ref-for-navigable-container⑦">navigable container</a> or a <a data-link-type="dfn" href="#fenced-navigable-containers" id="ref-for-fenced-navigable-containers①③">fenced navigable container</a>.</p>
+      <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#assert" id="ref-for-assert⑧">Assert</a>: if not null, <var>container</var> is either a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable-container" id="ref-for-navigable-container⑦">navigable container</a> or a <a data-link-type="dfn" href="#fenced-navigable-containers" id="ref-for-fenced-navigable-containers①③">fenced navigable container</a>.</p>
     </ol>
     <p>Rewrite step 3 to read:</p>
     <ol start="4">
@@ -2864,7 +2952,7 @@ <h4 class="heading settled" data-level="4.3.1" id="permissions-policy-patches"><
    </div>
    <div class="algorithm" data-algorithm="create-permissions-policy-response">
      Modify the <a data-link-type="abstract-op" href="https://w3c.github.io/webappsec-permissions-policy/#create-from-response" id="ref-for-create-from-response">Create a Permissions Policy for a navigable from response</a> algorithm to read: 
-    <p>Given null, a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable-container" id="ref-for-navigable-container⑧">navigable container</a>-or-<a data-link-type="dfn" href="#fenced-navigable-containers" id="ref-for-fenced-navigable-containers①④">fenced navigable container</a> (<var>container</var>), an <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#concept-origin" id="ref-for-concept-origin⑤">origin</a> (<var>origin</var>), and a <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#concept-response" id="ref-for-concept-response②">response</a> (<var>response</var>), this algorithm returns a
+    <p>Given null, a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable-container" id="ref-for-navigable-container⑧">navigable container</a>-or-<a data-link-type="dfn" href="#fenced-navigable-containers" id="ref-for-fenced-navigable-containers①④">fenced navigable container</a> (<var>container</var>), an <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#concept-origin" id="ref-for-concept-origin⑥">origin</a> (<var>origin</var>), and a <a data-link-type="dfn" href="https://fetch.spec.whatwg.org/#concept-response" id="ref-for-concept-response②">response</a> (<var>response</var>), this algorithm returns a
   new <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/dom.html#concept-document-permissions-policy" id="ref-for-concept-document-permissions-policy③">permissions policy</a>.</p>
     <p>Add a step before step 1 that reads:</p>
     <ol>
@@ -2879,14 +2967,14 @@ <h4 class="heading settled" data-level="4.3.1" id="permissions-policy-patches"><
     </ol>
    </div>
    <div class="algorithm" data-algorithm="attempt-populate-history-patches">
-     Modify <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#attempt-to-populate-the-history-entry&apos;s-document" id="ref-for-attempt-to-populate-the-history-entry&apos;s-document②">attempt to populate the history entry’s document</a> algorithm. Add a step
+     Modify <a data-link-type="biblio" href="#biblio-html" title="HTML Standard">[HTML]</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#attempt-to-populate-the-history-entry&apos;s-document" id="ref-for-attempt-to-populate-the-history-entry&apos;s-document③">attempt to populate the history entry’s document</a> algorithm. Add a step
   before the step inside the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#queue-a-task" id="ref-for-queue-a-task①">queued task</a> starting with "If <var>failure</var> is true, then:" that reads: 
     <ol start="8">
      <li data-md>
       <p>Otherwise, if the result of <a data-link-type="dfn" href="#should-navigation-response-to-navigation-request-be-blocked-by-permissions-policy" id="ref-for-should-navigation-response-to-navigation-request-be-blocked-by-permissions-policy①">should navigation response to navigation request be blocked by
 Permissions Policy?</a> given <var>navigationParams</var> is "<code>Blocked</code>", then set <var>failure</var> to true.</p>
     </ol>
-    <p class="note" role="note"><span class="marker">Note:</span> If this algorithm returns "<code>Blocked</code>", the pre-existing <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③⓪">Document</a></code> in the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑧②">fencedframe</a></code> does not stick around; an error page will be loaded.</p>
+    <p class="note" role="note"><span class="marker">Note:</span> If this algorithm returns "<code>Blocked</code>", the pre-existing <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③①">Document</a></code> in the <code><a data-link-type="element" href="#elementdef-fencedframe" id="ref-for-elementdef-fencedframe⑧⑤">fencedframe</a></code> does not stick around; an error page will be loaded.</p>
    </div>
    <div class="algorithm" data-algorithm="permissions-policy-block-request">
      Create a new algorithm called <dfn class="dfn-paneled" data-dfn-type="dfn" data-lt="should navigation response to navigation request be blocked by Permissions Policy?" data-noexport id="should-navigation-response-to-navigation-request-be-blocked-by-permissions-policy">should navigation response to navigation request be blocked by
@@ -2902,7 +2990,7 @@ <h4 class="heading settled" data-level="4.3.1" id="permissions-policy-patches"><
      <li data-md>
       <p>Let <var>origin</var> be <var>navigationParams</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigation-params-origin" id="ref-for-navigation-params-origin②">origin</a>.</p>
      <li data-md>
-      <p>Let <var>effective permissions</var> be the <var>navigable</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-bc" id="ref-for-nav-bc③">active browsing context</a>'s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance①④">fenced frame config instance</a>'s <a data-link-type="dfn" href="#fenced-frame-config-instance-effective-enabled-permissions" id="ref-for-fenced-frame-config-instance-effective-enabled-permissions②">effective
+      <p>Let <var>effective permissions</var> be the <var>navigable</var>’s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-bc" id="ref-for-nav-bc③">active browsing context</a>'s <a data-link-type="dfn" href="#browsing-context-fenced-frame-config-instance" id="ref-for-browsing-context-fenced-frame-config-instance①⑤">fenced frame config instance</a>'s <a data-link-type="dfn" href="#fenced-frame-config-instance-effective-enabled-permissions" id="ref-for-fenced-frame-config-instance-effective-enabled-permissions②">effective
  enabled permissions</a>.</p>
       <p class="issue" id="issue-0ffad658"><a class="self-link" href="#issue-0ffad658"></a> Per work omitted in <a href="https://github.com/WICG/fenced-frame/pull/84#discussion_r1186531028">pull request
  #84</a>, the config instance
@@ -2912,14 +3000,14 @@ <h4 class="heading settled" data-level="4.3.1" id="permissions-policy-patches"><
       <p>Let <var>permissions policy</var> be the result of <a data-link-type="abstract-op" href="https://w3c.github.io/webappsec-permissions-policy/#create-for-navigable" id="ref-for-create-for-navigable②"> creating a permissions policy</a> given <var>navigable</var>’s <a data-link-type="dfn" href="#fenced-navigable-containers" id="ref-for-fenced-navigable-containers①⑥">fenced navigable container</a>, <var>origin</var>,
  and <var>fenced</var> set to true.</p>
       <p class="note" role="note"><span class="marker">Note:</span> This is identical to the <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/dom.html#concept-document-permissions-policy" id="ref-for-concept-document-permissions-policy④">permissions policy</a> that will be created when the
- navigation constructs the ultimate <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③①">Document</a></code> for this pending navigation. We create it now
+ navigation constructs the ultimate <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③②">Document</a></code> for this pending navigation. We create it now
  and run tests on it since this is the appropriate time to determine if a navigation will fail,
  and then throw it away. If the navigation succeeds, it will be recreated identically and
- unconditionally installed on the <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③②">Document</a></code>.</p>
+ unconditionally installed on the <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③③">Document</a></code>.</p>
      <li data-md>
       <p>Let <var>inherited policy</var> be <var>permissions policy</var>’s <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#inherited-policy" id="ref-for-inherited-policy④">inherited policy</a>.</p>
      <li data-md>
-      <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-iterate" id="ref-for-list-iterate④">For each</a> <var>effective permission</var> of <var>effective permissions</var>:</p>
+      <p><a data-link-type="dfn" href="https://infra.spec.whatwg.org/#list-iterate" id="ref-for-list-iterate⑤">For each</a> <var>effective permission</var> of <var>effective permissions</var>:</p>
       <ol>
        <li data-md>
         <p>If <var>inherited policy</var>[<var>effective permission</var>] is "Disabled", return "<code>Blocked</code>".</p>
@@ -2931,8 +3019,8 @@ <h4 class="heading settled" data-level="4.3.1" id="permissions-policy-patches"><
    <div class="algorithm" data-algorithm="define-inherited-policy-in-container-patches">
      Modify the <a data-link-type="abstract-op" href="https://w3c.github.io/webappsec-permissions-policy/#define-inherited-policy-in-container" id="ref-for-define-inherited-policy-in-container①">Define an inherited policy for feature in container at origin</a> algorithm to
   read: 
-    <p>Given a feature (<var>feature</var>), null or a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable-container" id="ref-for-navigable-container⑨">navigable container</a> (<var>container</var>), an <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#concept-origin" id="ref-for-concept-origin⑥">origin</a> for a
-  document in that container (<var>origin</var>), and an optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean⑥">boolean</a> <var>fenced</var> that defaults to
+    <p>Given a feature (<var>feature</var>), null or a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#navigable-container" id="ref-for-navigable-container⑨">navigable container</a> (<var>container</var>), an <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#concept-origin" id="ref-for-concept-origin⑦">origin</a> for a
+  document in that container (<var>origin</var>), and an optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean⑦">boolean</a> <var>fenced</var> that defaults to
   false, this algorithm returns the <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy#inherited-policy" id="ref-for-inherited-policy⑤">inherited policy</a> for that feature.</p>
     <p>Rewrite step 3 to read:</p>
     <ol start="3">
@@ -2940,18 +3028,18 @@ <h4 class="heading settled" data-level="4.3.1" id="permissions-policy-patches"><
       <p>If the result of executing <a data-link-type="abstract-op" href="https://w3c.github.io/webappsec-permissions-policy/#is-feature-enabled" id="ref-for-is-feature-enabled">Is feature enabled in document for origin?</a> on <var>feature</var>, <var>container</var>’s <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-node-document" id="ref-for-concept-node-document④">node document</a>, <var>origin</var>, and <var>fenced</var> is "Disabled", return
  "Disabled".</p>
     </ol>
-    <p class="note" role="note"><span class="marker">Note:</span> We don’t have to rewrite step 2, which also delegates to the same algorithm, to pass in the <var>fenced</var> <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean⑦">boolean</a> because step 2 has to do with checking to see if <var>feature</var> is enabled <var>container</var>’s <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-node-document" id="ref-for-concept-node-document⑤">node document</a>, not the <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③③">Document</a></code> hosted <em>inside</em> <var>container</var>.</p>
+    <p class="note" role="note"><span class="marker">Note:</span> We don’t have to rewrite step 2, which also delegates to the same algorithm, to pass in the <var>fenced</var> <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean⑧">boolean</a> because step 2 has to do with checking to see if <var>feature</var> is enabled <var>container</var>’s <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-node-document" id="ref-for-concept-node-document⑤">node document</a>, not the <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③④">Document</a></code> hosted <em>inside</em> <var>container</var>.</p>
     <p>Rewrite step 7 to read:</p>
     <ol start="7">
      <li data-md>
-      <p>If <var>fenced</var> is false, <var>feature</var>’s <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature-default-allowlist" id="ref-for-policy-controlled-feature-default-allowlist④">default allowlist</a> is <code>'self'</code>, and <var>origin</var> is <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#same-origin" id="ref-for-same-origin⑥">same origin</a> with <var>container</var>’s <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-node-document" id="ref-for-concept-node-document⑥">node document</a>'s
+      <p>If <var>fenced</var> is false, <var>feature</var>’s <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature-default-allowlist" id="ref-for-policy-controlled-feature-default-allowlist④">default allowlist</a> is <code>'self'</code>, and <var>origin</var> is <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#same-origin" id="ref-for-same-origin⑦">same origin</a> with <var>container</var>’s <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-node-document" id="ref-for-concept-node-document⑥">node document</a>'s
  origin, return <code>"Enabled"</code>.</p>
     </ol>
    </div>
    <div class="algorithm" data-algorithm="is-feature-enabled-patches">
      Modify the <a data-link-type="abstract-op" href="https://w3c.github.io/webappsec-permissions-policy/#is-feature-enabled" id="ref-for-is-feature-enabled①">Is feature enabled in document for origin?</a> algorithm to read: 
-    <p>Given a feature (<var>feature</var>), a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③④">Document</a></code> object (<var>document</var>), an <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-origin" id="ref-for-concept-url-origin③">origin</a> (<var>origin</var>), and
-  an optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean⑧">boolean</a> <var>fenced</var> that defaults to false, this algorithm returns "<code>Disabled</code>" if <var>feature</var> should be considered disabled, and "<code>Enabled</code>" otherwise.</p>
+    <p>Given a feature (<var>feature</var>), a <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③⑤">Document</a></code> object (<var>document</var>), an <a data-link-type="dfn" href="https://url.spec.whatwg.org/#concept-url-origin" id="ref-for-concept-url-origin④">origin</a> (<var>origin</var>), and
+  an optional <a data-link-type="dfn" href="https://infra.spec.whatwg.org/#boolean" id="ref-for-boolean⑨">boolean</a> <var>fenced</var> that defaults to false, this algorithm returns "<code>Disabled</code>" if <var>feature</var> should be considered disabled, and "<code>Enabled</code>" otherwise.</p>
     <p>Rewrite step 3 to read:</p>
     <ol start="3">
      <li data-md>
@@ -2970,7 +3058,7 @@ <h4 class="heading settled" data-level="4.3.1" id="permissions-policy-patches"><
     <ol start="5">
      <li data-md>
       <p>If <var>fenced</var> is false, <var>feature</var>’s <a data-link-type="dfn" href="https://w3c.github.io/webappsec-permissions-policy/#policy-controlled-feature-default-allowlist" id="ref-for-policy-controlled-feature-default-allowlist⑤">default allowlist</a> is <code>'self'</code>,
- and <var>origin</var> is <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#same-origin" id="ref-for-same-origin⑦">same origin</a> with <var>document</var>’s origin, return "Enabled".</p>
+ and <var>origin</var> is <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/browsers.html#same-origin" id="ref-for-same-origin⑧">same origin</a> with <var>document</var>’s origin, return "Enabled".</p>
     </ol>
    </div>
    <details class="wpt-tests-block" dir="ltr" lang="en" open>
@@ -3001,9 +3089,9 @@ <h3 class="heading settled" data-level="4.4" id="cssom-monkeypatch"><span class=
   reads: 
     <ol start="14">
      <li data-md>
-      <p>If <var>scrolling box</var>’s associated <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#element" id="ref-for-element①">Element</a></code>'s associated <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③⑤">Document</a></code>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable①⓪">node
+      <p>If <var>scrolling box</var>’s associated <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#element" id="ref-for-element①">Element</a></code>'s associated <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③⑥">Document</a></code>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable①①">node
  navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-traversable" id="ref-for-nav-traversable④">traversable navigable</a> is a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable⑤⑤">fenced
- navigable</a>, or if <var>scrolling box</var>’s associated <a data-link-type="dfn" href="https://www.w3.org/TR/CSS21/visuren.html#viewport" id="ref-for-viewport①">viewport</a>'s associated <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③⑥">Document</a></code>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable①①">node navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-traversable" id="ref-for-nav-traversable⑤">traversable navigable</a> is a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable⑤⑥">fenced navigable</a>, then let this be the last instance of this algorithm that stops
+ navigable</a>, or if <var>scrolling box</var>’s associated <a data-link-type="dfn" href="https://www.w3.org/TR/CSS21/visuren.html#viewport" id="ref-for-viewport①">viewport</a>'s associated <code class="idl"><a data-link-type="idl" href="https://dom.spec.whatwg.org/#document" id="ref-for-document③⑦">Document</a></code>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#node-navigable" id="ref-for-node-navigable①②">node navigable</a>'s <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/document-sequences.html#nav-traversable" id="ref-for-nav-traversable⑤">traversable navigable</a> is a <a data-link-type="dfn" href="#fenced-navigable-container-fenced-navigable" id="ref-for-fenced-navigable-container-fenced-navigable⑤⑥">fenced navigable</a>, then let this be the last instance of this algorithm that stops
  any further recursive instances that would otherwise follow.</p>
     </ol>
     <p class="note" role="note"><span class="marker">Note:</span> This allows scrolling to "bubble up" to a fenced frame boundary, but not cross it.</p>
@@ -3038,6 +3126,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
     </ul>
    <li><a href="#exfiltration-budget-metadata-amount-to-debit">amount to debit</a><span>, in § 2.3.2</span>
    <li><a href="#exfiltration-budget-metadata-reference-amount-to-debit-reference">amount to debit reference</a><span>, in § 2.3.2</span>
+   <li><a href="#attempt-to-send-an-automatic-beacon">attempt to send an automatic beacon</a><span>, in § 2.6</span>
    <li><a href="#fenced-frame-reporter-automatic-beacon-data">automatic beacon data</a><span>, in § 2.3.2</span>
    <li><a href="#dom-fencereportingdestination-buyer">"buyer"</a><span>, in § 2.4</span>
    <li><a href="#dom-fencereportingdestination-component-seller">"component-seller"</a><span>, in § 2.4</span>
@@ -3129,12 +3218,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
     </ul>
    <li><a href="#supports-loading-mode-fenced-frame">fenced-frame</a><span>, in § 3.7.1</span>
    <li><a href="#elementdef-fencedframe">fencedframe</a><span>, in § 2</span>
-   <li>
-    fenced frame config
-    <ul>
-     <li><a href="#fenced-frame-config">definition of</a><span>, in § 2.3.2</span>
-     <li><a href="#source-snapshot-params-fenced-frame-config">dfn for source snapshot params</a><span>, in § 3.7.3</span>
-    </ul>
+   <li><a href="#fenced-frame-config">fenced frame config</a><span>, in § 2.3.2</span>
    <li><a href="#fencedframeconfig">FencedFrameConfig</a><span>, in § 2.3.4</span>
    <li>
     fenced frame config instance
@@ -3192,6 +3276,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
    <li><a href="#dom-htmlfencedframeelement-htmlfencedframeelement">HTMLFencedFrameElement()</a><span>, in § 2</span>
    <li><a href="#inclusive-dn-unfenced">inclusive-dn-unfenced</a><span>, in § 3.5</span>
    <li><a href="#initialize-the-nested-traversable">initialize the nested traversable</a><span>, in § 3.4.3</span>
+   <li><a href="#source-snapshot-params-initiator-fenced-frame-config-instance">initiator fenced frame config instance</a><span>, in § 3.7.3</span>
    <li><a href="#instantiate-a-config">instantiate a config</a><span>, in § 2.3.3</span>
    <li>
     interest group descriptor
@@ -3215,6 +3300,12 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
      <li><a href="#fenced-frame-config-nested-configs">dfn for fenced frame config</a><span>, in § 2.3.2</span>
      <li><a href="#fenced-frame-config-instance-nested-configs">dfn for fenced frame config instance</a><span>, in § 2.3.3</span>
     </ul>
+   <li>
+    once
+    <ul>
+     <li><a href="#automatic-beacon-data-once">dfn for automatic beacon data</a><span>, in § 2.3.2</span>
+     <li><a href="#dom-fenceevent-once">dict-member for FenceEvent</a><span>, in § 2.4</span>
+    </ul>
    <li>
     on navigate callback
     <ul>
@@ -3252,6 +3343,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
    <li><a href="#fencedframetype-size">size</a><span>, in § 2.3.2</span>
    <li><a href="#fenced-frame-config-mapping-store-a-pending-config">store a pending config</a><span>, in § 2.2</span>
    <li><a href="#fenced-frame-config-mapping-store-nested-configs">store nested configs</a><span>, in § 2.2</span>
+   <li><a href="#source-snapshot-params-target-fenced-frame-config">target fenced frame config</a><span>, in § 3.7.3</span>
    <li>
     top-level traversable
     <ul>
@@ -3469,6 +3561,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-elsewhere"><span cla
      <li><span class="dfn-paneled" id="fafafd09">get the focusable area</span>
      <li><span class="dfn-paneled" id="8fc74046">global attributes</span>
      <li><span class="dfn-paneled" id="7c421916">has focus steps</span>
+     <li><span class="dfn-paneled" id="dfa9c14c">has transient activation</span>
      <li><span class="dfn-paneled" id="0b79108e">height</span>
      <li><span class="dfn-paneled" id="979264d7">hide popover algorithm</span>
      <li><span class="dfn-paneled" id="5ea2b73e">history policy container</span>
@@ -3478,6 +3571,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-elsewhere"><span cla
      <li><span class="dfn-paneled" id="a72449dd">in parallel</span>
      <li><span class="dfn-paneled" id="dbdbb853">inclusive descendant navigables</span>
      <li><span class="dfn-paneled" id="2fa84525">initialize the navigable</span>
+     <li><span class="dfn-paneled" id="2895d75d">initiator origin</span>
      <li><span class="dfn-paneled" id="bd7d36d0">interactive content</span>
      <li><span class="dfn-paneled" id="fc2d4032">interactively validate the constraints</span>
      <li><span class="dfn-paneled" id="af07f0c4">length</span>
@@ -3493,6 +3587,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-elsewhere"><span cla
      <li><span class="dfn-paneled" id="e86519ee">none</span>
      <li><span class="dfn-paneled" id="fbadcbc4">nothing</span>
      <li><span class="dfn-paneled" id="e8798b0b">ongoing navigation</span>
+     <li><span class="dfn-paneled" id="cbe46402">opener</span>
      <li><span class="dfn-paneled" id="086e3aff">origin</span>
      <li><span class="dfn-paneled" id="43ac8374">origin <small>(for environment settings object)</small></span>
      <li><span class="dfn-paneled" id="225c2b02">origin <small>(for navigation params)</small></span>
@@ -3520,6 +3615,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-elsewhere"><span cla
      <li><span class="dfn-paneled" id="8c20d82f">sequential focus navigation</span>
      <li><span class="dfn-paneled" id="6197cadb">sequential navigation search algorithm</span>
      <li><span class="dfn-paneled" id="5e1e14ce">session history entries</span>
+     <li><span class="dfn-paneled" id="ba5c8415">snapshot source snapshot params</span>
      <li><span class="dfn-paneled" id="b285d8c5">source policy container</span>
      <li><span class="dfn-paneled" id="77093875">source snapshot params</span>
      <li><span class="dfn-paneled" id="deddc6fc">src</span>
@@ -3618,6 +3714,7 @@ <h3 class="no-num no-ref heading settled" id="index-defined-elsewhere"><span cla
      <li><span class="dfn-paneled" id="8855a9aa">DOMString</span>
      <li><span class="dfn-paneled" id="889e932f">Exposed</span>
      <li><span class="dfn-paneled" id="b0d7f3c3">USVString</span>
+     <li><span class="dfn-paneled" id="5372cca8">boolean</span>
      <li><span class="dfn-paneled" id="56f81a8e">new</span>
      <li><span class="dfn-paneled" id="9cce47fd">sequence</span>
      <li><span class="dfn-paneled" id="4013a022">this</span>
@@ -3706,6 +3803,7 @@ <h2 class="no-num no-ref heading settled" id="idl-index"><span class="content">I
   <c- b>required</c-> <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString"><c- b>DOMString</c-></a> <a data-type="DOMString " href="#dom-fenceevent-eventtype"><code><c- g>eventType</c-></code></a>;
   <c- b>required</c-> <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString"><c- b>DOMString</c-></a> <a data-type="DOMString " href="#dom-fenceevent-eventdata"><code><c- g>eventData</c-></code></a>;
   <c- b>required</c-> <a data-link-type="dfn" href="https://webidl.spec.whatwg.org/#idl-sequence"><c- b>sequence</c-></a>&lt;<a data-link-type="idl-name" href="#enumdef-fencereportingdestination"><c- n>FenceReportingDestination</c-></a>> <a data-type="sequence<FenceReportingDestination> " href="#dom-fenceevent-destination"><code><c- g>destination</c-></code></a>;
+  <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-boolean"><c- b>boolean</c-></a> <a data-default="false" data-type="boolean " href="#dom-fenceevent-once"><code><c- g>once</c-></code></a> = <c- b>false</c->;
 };
 
 <c- b>typedef</c-> (<a data-link-type="idl-name" href="#dictdef-fenceevent"><c- n>FenceEvent</c-></a> <c- b>or</c-> <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString"><c- b>DOMString</c-></a>) <a href="#typedefdef-reporteventtype"><code><c- g>ReportEventType</c-></code></a>;
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@@ -4330,7 +4433,7 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
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 window.dfnpanelData['fencedframetype-pending-event'] = {"dfnID": "fencedframetype-pending-event", "url": "#fencedframetype-pending-event", "dfnText": "pending event", "refSections": [{"refs": [{"id": "ref-for-fencedframetype-pending-event"}, {"id": "ref-for-fencedframetype-pending-event\u2460"}], "title": "2.3.2. The fenced frame config struct"}], "external": false};
 window.dfnpanelData['pending-event-destination'] = {"dfnID": "pending-event-destination", "url": "#pending-event-destination", "dfnText": "destination", "refSections": [{"refs": [{"id": "ref-for-pending-event-destination"}], "title": "2.3.2. The fenced frame config struct"}], "external": false};
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+window.dfnpanelData['pending-event-eventtype'] = {"dfnID": "pending-event-eventtype", "url": "#pending-event-eventtype", "dfnText": "eventType", "refSections": [{"refs": [{"id": "ref-for-pending-event-eventtype"}, {"id": "ref-for-pending-event-eventtype\u2460"}], "title": "2.3.2. The fenced frame config struct"}, {"refs": [{"id": "ref-for-pending-event-eventtype\u2461"}], "title": "2.6. Automatic Reporting"}], "external": false};
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 window.dfnpanelData['fencedframetype-fenced-frame-reporting-map'] = {"dfnID": "fencedframetype-fenced-frame-reporting-map", "url": "#fencedframetype-fenced-frame-reporting-map", "dfnText": "fenced frame reporting map", "refSections": [{"refs": [{"id": "ref-for-fencedframetype-fenced-frame-reporting-map"}, {"id": "ref-for-fencedframetype-fenced-frame-reporting-map\u2460"}, {"id": "ref-for-fencedframetype-fenced-frame-reporting-map\u2461"}], "title": "2.3.2. The fenced frame config struct"}], "external": false};
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@@ -4339,11 +4442,12 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
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 window.dfnpanelData['fencedframetype-fenced-frame-reporter'] = {"dfnID": "fencedframetype-fenced-frame-reporter", "url": "#fencedframetype-fenced-frame-reporter", "dfnText": "fenced frame reporter", "refSections": [{"refs": [{"id": "ref-for-fencedframetype-fenced-frame-reporter"}, {"id": "ref-for-fencedframetype-fenced-frame-reporter\u2460"}], "title": "2.3.2. The fenced frame config struct"}, {"refs": [{"id": "ref-for-fencedframetype-fenced-frame-reporter\u2461"}, {"id": "ref-for-fencedframetype-fenced-frame-reporter\u2462"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
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-window.dfnpanelData['automatic-beacon-data-eventdata'] = {"dfnID": "automatic-beacon-data-eventdata", "url": "#automatic-beacon-data-eventdata", "dfnText": "eventData", "refSections": [{"refs": [{"id": "ref-for-automatic-beacon-data-eventdata"}], "title": "2.4. The Fence interface"}], "external": false};
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+window.dfnpanelData['fenced-frame-reporter-automatic-beacon-data'] = {"dfnID": "fenced-frame-reporter-automatic-beacon-data", "url": "#fenced-frame-reporter-automatic-beacon-data", "dfnText": "automatic beacon data", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-reporter-automatic-beacon-data"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-reporter-automatic-beacon-data\u2460"}], "title": "2.4. The Fence interface"}, {"refs": [{"id": "ref-for-fenced-frame-reporter-automatic-beacon-data\u2461"}, {"id": "ref-for-fenced-frame-reporter-automatic-beacon-data\u2462"}], "title": "2.6. Automatic Reporting"}, {"refs": [{"id": "ref-for-fenced-frame-reporter-automatic-beacon-data\u2463"}], "title": "3.7.3. Actual navigation changes"}], "external": false};
+window.dfnpanelData['automatic-beacon-data-eventdata'] = {"dfnID": "automatic-beacon-data-eventdata", "url": "#automatic-beacon-data-eventdata", "dfnText": "eventData", "refSections": [{"refs": [{"id": "ref-for-automatic-beacon-data-eventdata"}], "title": "2.4. The Fence interface"}, {"refs": [{"id": "ref-for-automatic-beacon-data-eventdata\u2460"}], "title": "2.6. Automatic Reporting"}], "external": false};
+window.dfnpanelData['automatic-beacon-data-destination'] = {"dfnID": "automatic-beacon-data-destination", "url": "#automatic-beacon-data-destination", "dfnText": "destination", "refSections": [{"refs": [{"id": "ref-for-automatic-beacon-data-destination"}], "title": "2.4. The Fence interface"}, {"refs": [{"id": "ref-for-automatic-beacon-data-destination\u2460"}], "title": "2.6. Automatic Reporting"}], "external": false};
+window.dfnpanelData['automatic-beacon-data-once'] = {"dfnID": "automatic-beacon-data-once", "url": "#automatic-beacon-data-once", "dfnText": "once", "refSections": [{"refs": [{"id": "ref-for-automatic-beacon-data-once"}], "title": "2.4. The Fence interface"}, {"refs": [{"id": "ref-for-automatic-beacon-data-once\u2460"}], "title": "2.6. Automatic Reporting"}], "external": false};
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-window.dfnpanelData['report-an-event'] = {"dfnID": "report-an-event", "url": "#report-an-event", "dfnText": "report an event", "refSections": [{"refs": [{"id": "ref-for-report-an-event"}], "title": "2.3.2. The fenced frame config struct"}, {"refs": [{"id": "ref-for-report-an-event\u2460"}], "title": "2.4. The Fence interface"}], "external": false};
+window.dfnpanelData['report-an-event'] = {"dfnID": "report-an-event", "url": "#report-an-event", "dfnText": "report an event", "refSections": [{"refs": [{"id": "ref-for-report-an-event"}], "title": "2.3.2. The fenced frame config struct"}, {"refs": [{"id": "ref-for-report-an-event\u2460"}], "title": "2.4. The Fence interface"}, {"refs": [{"id": "ref-for-report-an-event\u2461"}, {"id": "ref-for-report-an-event\u2462"}], "title": "2.6. Automatic Reporting"}], "external": false};
 window.dfnpanelData['report-a-private-aggregation-event'] = {"dfnID": "report-a-private-aggregation-event", "url": "#report-a-private-aggregation-event", "dfnText": "report a private aggregation event", "refSections": [{"refs": [{"id": "ref-for-report-a-private-aggregation-event"}], "title": "2.4. The Fence interface"}], "external": false};
 window.dfnpanelData['fencedframetype-exfiltration-budget-metadata'] = {"dfnID": "fencedframetype-exfiltration-budget-metadata", "url": "#fencedframetype-exfiltration-budget-metadata", "dfnText": "exfiltration budget metadata", "refSections": [{"refs": [{"id": "ref-for-fencedframetype-exfiltration-budget-metadata"}], "title": "2.3.2. The fenced frame config struct"}], "external": false};
 window.dfnpanelData['exfiltration-budget-metadata-origin'] = {"dfnID": "exfiltration-budget-metadata-origin", "url": "#exfiltration-budget-metadata-origin", "dfnText": "origin", "refSections": [{"refs": [{"id": "ref-for-exfiltration-budget-metadata-origin"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
@@ -4352,7 +4456,7 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
 window.dfnpanelData['exfiltration-budget-metadata-reference-origin'] = {"dfnID": "exfiltration-budget-metadata-reference-origin", "url": "#exfiltration-budget-metadata-reference-origin", "dfnText": "origin", "refSections": [{"refs": [{"id": "ref-for-exfiltration-budget-metadata-reference-origin"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
 window.dfnpanelData['exfiltration-budget-metadata-reference-amount-to-debit-reference'] = {"dfnID": "exfiltration-budget-metadata-reference-amount-to-debit-reference", "url": "#exfiltration-budget-metadata-reference-amount-to-debit-reference", "dfnText": "amount to debit reference", "refSections": [{"refs": [{"id": "ref-for-exfiltration-budget-metadata-reference-amount-to-debit-reference"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
 window.dfnpanelData['partition-nonce'] = {"dfnID": "partition-nonce", "url": "#partition-nonce", "dfnText": "partition nonce", "refSections": [{"refs": [{"id": "ref-for-partition-nonce"}, {"id": "ref-for-partition-nonce\u2460"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
-window.dfnpanelData['fenced-frame-config'] = {"dfnID": "fenced-frame-config", "url": "#fenced-frame-config", "dfnText": "fenced frame config", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config"}, {"id": "ref-for-fenced-frame-config\u2460"}, {"id": "ref-for-fenced-frame-config\u2461"}, {"id": "ref-for-fenced-frame-config\u2462"}, {"id": "ref-for-fenced-frame-config\u2463"}, {"id": "ref-for-fenced-frame-config\u2464"}, {"id": "ref-for-fenced-frame-config\u2465"}], "title": "2.2. Fenced frame config mapping"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2466"}, {"id": "ref-for-fenced-frame-config\u2467"}, {"id": "ref-for-fenced-frame-config\u2468"}, {"id": "ref-for-fenced-frame-config\u2460\u24ea"}, {"id": "ref-for-fenced-frame-config\u2460\u2460"}], "title": "2.3.1. Introduction"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2460\u2461"}, {"id": "ref-for-fenced-frame-config\u2460\u2462"}], "title": "2.3.2. The fenced frame config struct"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2460\u2463"}, {"id": "ref-for-fenced-frame-config\u2460\u2464"}, {"id": "ref-for-fenced-frame-config\u2460\u2465"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2460\u2466"}, {"id": "ref-for-fenced-frame-config\u2460\u2467"}], "title": "2.3.4. The FencedFrameConfig interface"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2460\u2468"}], "title": "3.7.3. Actual navigation changes"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2461\u24ea"}, {"id": "ref-for-fenced-frame-config\u2461\u2460"}], "title": "4.3. Permissions Policies"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2461\u2461"}], "title": "4.3.1. Algorithm patches"}], "external": false};
+window.dfnpanelData['fenced-frame-config'] = {"dfnID": "fenced-frame-config", "url": "#fenced-frame-config", "dfnText": "fenced frame config", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config"}, {"id": "ref-for-fenced-frame-config\u2460"}, {"id": "ref-for-fenced-frame-config\u2461"}, {"id": "ref-for-fenced-frame-config\u2462"}, {"id": "ref-for-fenced-frame-config\u2463"}, {"id": "ref-for-fenced-frame-config\u2464"}, {"id": "ref-for-fenced-frame-config\u2465"}], "title": "2.2. Fenced frame config mapping"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2466"}, {"id": "ref-for-fenced-frame-config\u2467"}, {"id": "ref-for-fenced-frame-config\u2468"}, {"id": "ref-for-fenced-frame-config\u2460\u24ea"}, {"id": "ref-for-fenced-frame-config\u2460\u2460"}], "title": "2.3.1. Introduction"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2460\u2461"}, {"id": "ref-for-fenced-frame-config\u2460\u2462"}], "title": "2.3.2. The fenced frame config struct"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2460\u2463"}, {"id": "ref-for-fenced-frame-config\u2460\u2464"}, {"id": "ref-for-fenced-frame-config\u2460\u2465"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2460\u2466"}, {"id": "ref-for-fenced-frame-config\u2460\u2467"}], "title": "2.3.4. The FencedFrameConfig interface"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2460\u2468"}, {"id": "ref-for-fenced-frame-config\u2461\u24ea"}], "title": "3.7.3. Actual navigation changes"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2461\u2460"}, {"id": "ref-for-fenced-frame-config\u2461\u2461"}], "title": "4.3. Permissions Policies"}, {"refs": [{"id": "ref-for-fenced-frame-config\u2461\u2462"}], "title": "4.3.1. Algorithm patches"}], "external": false};
 window.dfnpanelData['fenced-frame-config-mapped-url'] = {"dfnID": "fenced-frame-config-mapped-url", "url": "#fenced-frame-config-mapped-url", "dfnText": "mapped url", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-mapped-url"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config-mapped-url\u2460"}, {"id": "ref-for-fenced-frame-config-mapped-url\u2461"}], "title": "3.7.3. Actual navigation changes"}], "external": false};
 window.dfnpanelData['mapped-url-value'] = {"dfnID": "mapped-url-value", "url": "#mapped-url-value", "dfnText": "value", "refSections": [{"refs": [{"id": "ref-for-mapped-url-value"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-mapped-url-value\u2460"}, {"id": "ref-for-mapped-url-value\u2461"}], "title": "3.7.3. Actual navigation changes"}], "external": false};
 window.dfnpanelData['fenced-frame-config-container-size'] = {"dfnID": "fenced-frame-config-container-size", "url": "#fenced-frame-config-container-size", "dfnText": "container size", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-container-size"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config-container-size\u2460"}, {"id": "ref-for-fenced-frame-config-container-size\u2461"}, {"id": "ref-for-fenced-frame-config-container-size\u2462"}, {"id": "ref-for-fenced-frame-config-container-size\u2463"}], "title": "2.3.4. The FencedFrameConfig interface"}], "external": false};
@@ -4373,21 +4477,21 @@ <h2 class="no-num no-ref heading settled" id="issues-index"><span class="content
 window.dfnpanelData['fenced-frame-config-nested-configs'] = {"dfnID": "fenced-frame-config-nested-configs", "url": "#fenced-frame-config-nested-configs", "dfnText": "nested configs", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-nested-configs"}, {"id": "ref-for-fenced-frame-config-nested-configs\u2460"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
 window.dfnpanelData['nested-configs-value'] = {"dfnID": "nested-configs-value", "url": "#nested-configs-value", "dfnText": "value", "refSections": [{"refs": [{"id": "ref-for-nested-configs-value"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
 window.dfnpanelData['fenced-frame-config-embedder-shared-storage-context'] = {"dfnID": "fenced-frame-config-embedder-shared-storage-context", "url": "#fenced-frame-config-embedder-shared-storage-context", "dfnText": "embedder shared storage context", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-embedder-shared-storage-context"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config-embedder-shared-storage-context\u2460"}], "title": "2.3.4. The FencedFrameConfig interface"}], "external": false};
-window.dfnpanelData['fenced-frame-config-instance'] = {"dfnID": "fenced-frame-config-instance", "url": "#fenced-frame-config-instance", "dfnText": "fenced frame config instance", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance"}], "title": "2.3.1. Introduction"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance\u2460"}, {"id": "ref-for-fenced-frame-config-instance\u2461"}, {"id": "ref-for-fenced-frame-config-instance\u2462"}, {"id": "ref-for-fenced-frame-config-instance\u2463"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance\u2464"}, {"id": "ref-for-fenced-frame-config-instance\u2465"}], "title": "3.7.3. Actual navigation changes"}], "external": false};
-window.dfnpanelData['fenced-frame-config-instance-mapped-url'] = {"dfnID": "fenced-frame-config-instance-mapped-url", "url": "#fenced-frame-config-instance-mapped-url", "dfnText": "mapped url", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-mapped-url"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance-mapped-url\u2460"}, {"id": "ref-for-fenced-frame-config-instance-mapped-url\u2461"}, {"id": "ref-for-fenced-frame-config-instance-mapped-url\u2462"}], "title": "2.4. The Fence interface"}], "external": false};
+window.dfnpanelData['fenced-frame-config-instance'] = {"dfnID": "fenced-frame-config-instance", "url": "#fenced-frame-config-instance", "dfnText": "fenced frame config instance", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance"}], "title": "2.3.1. Introduction"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance\u2460"}, {"id": "ref-for-fenced-frame-config-instance\u2461"}, {"id": "ref-for-fenced-frame-config-instance\u2462"}, {"id": "ref-for-fenced-frame-config-instance\u2463"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance\u2464"}, {"id": "ref-for-fenced-frame-config-instance\u2465"}, {"id": "ref-for-fenced-frame-config-instance\u2466"}, {"id": "ref-for-fenced-frame-config-instance\u2467"}], "title": "3.7.3. Actual navigation changes"}], "external": false};
+window.dfnpanelData['fenced-frame-config-instance-mapped-url'] = {"dfnID": "fenced-frame-config-instance-mapped-url", "url": "#fenced-frame-config-instance-mapped-url", "dfnText": "mapped url", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-mapped-url"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance-mapped-url\u2460"}, {"id": "ref-for-fenced-frame-config-instance-mapped-url\u2461"}, {"id": "ref-for-fenced-frame-config-instance-mapped-url\u2462"}], "title": "2.4. The Fence interface"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance-mapped-url\u2463"}], "title": "2.6. Automatic Reporting"}], "external": false};
 window.dfnpanelData['fenced-frame-config-instance-container-size'] = {"dfnID": "fenced-frame-config-instance-container-size", "url": "#fenced-frame-config-instance-container-size", "dfnText": "container size", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-container-size"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
 window.dfnpanelData['fenced-frame-config-instance-content-size'] = {"dfnID": "fenced-frame-config-instance-content-size", "url": "#fenced-frame-config-instance-content-size", "dfnText": "content size", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-content-size"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
 window.dfnpanelData['fenced-frame-config-instance-interest-group-descriptor'] = {"dfnID": "fenced-frame-config-instance-interest-group-descriptor", "url": "#fenced-frame-config-instance-interest-group-descriptor", "dfnText": "interest group descriptor", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-interest-group-descriptor"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
 window.dfnpanelData['fenced-frame-config-instance-on-navigate-callback'] = {"dfnID": "fenced-frame-config-instance-on-navigate-callback", "url": "#fenced-frame-config-instance-on-navigate-callback", "dfnText": "on navigate callback", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-on-navigate-callback"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance-on-navigate-callback\u2460"}], "title": "3.7.3. Actual navigation changes"}], "external": false};
 window.dfnpanelData['fenced-frame-config-instance-effective-sandbox-flags'] = {"dfnID": "fenced-frame-config-instance-effective-sandbox-flags", "url": "#fenced-frame-config-instance-effective-sandbox-flags", "dfnText": "effective sandbox flags", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-effective-sandbox-flags"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
 window.dfnpanelData['fenced-frame-config-instance-effective-enabled-permissions'] = {"dfnID": "fenced-frame-config-instance-effective-enabled-permissions", "url": "#fenced-frame-config-instance-effective-enabled-permissions", "dfnText": "effective enabled permissions", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-effective-enabled-permissions"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance-effective-enabled-permissions\u2460"}], "title": "4.3. Permissions Policies"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance-effective-enabled-permissions\u2461"}], "title": "4.3.1. Algorithm patches"}], "external": false};
-window.dfnpanelData['fenced-frame-config-instance-fenced-frame-reporter'] = {"dfnID": "fenced-frame-config-instance-fenced-frame-reporter", "url": "#fenced-frame-config-instance-fenced-frame-reporter", "dfnText": "fenced frame reporter", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter\u2460"}, {"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter\u2461"}, {"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter\u2462"}, {"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter\u2463"}, {"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter\u2464"}], "title": "2.4. The Fence interface"}], "external": false};
+window.dfnpanelData['fenced-frame-config-instance-fenced-frame-reporter'] = {"dfnID": "fenced-frame-config-instance-fenced-frame-reporter", "url": "#fenced-frame-config-instance-fenced-frame-reporter", "dfnText": "fenced frame reporter", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter\u2460"}, {"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter\u2461"}, {"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter\u2462"}, {"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter\u2463"}, {"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter\u2464"}], "title": "2.4. The Fence interface"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter\u2465"}, {"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter\u2466"}, {"id": "ref-for-fenced-frame-config-instance-fenced-frame-reporter\u2467"}], "title": "2.6. Automatic Reporting"}], "external": false};
 window.dfnpanelData['fenced-frame-config-instance-exfiltration-budget-metadata-reference'] = {"dfnID": "fenced-frame-config-instance-exfiltration-budget-metadata-reference", "url": "#fenced-frame-config-instance-exfiltration-budget-metadata-reference", "dfnText": "exfiltration budget metadata reference", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-exfiltration-budget-metadata-reference"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
 window.dfnpanelData['fenced-frame-config-instance-nested-configs'] = {"dfnID": "fenced-frame-config-instance-nested-configs", "url": "#fenced-frame-config-instance-nested-configs", "dfnText": "nested configs", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-nested-configs"}], "title": "2.2. Fenced frame config mapping"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance-nested-configs\u2460"}, {"id": "ref-for-fenced-frame-config-instance-nested-configs\u2461"}], "title": "2.3.3. The fenced frame config instance struct"}, {"refs": [{"id": "ref-for-fenced-frame-config-instance-nested-configs\u2462"}, {"id": "ref-for-fenced-frame-config-instance-nested-configs\u2463"}], "title": "2.4. The Fence interface"}], "external": false};
 window.dfnpanelData['fenced-frame-config-instance-partition-nonce'] = {"dfnID": "fenced-frame-config-instance-partition-nonce", "url": "#fenced-frame-config-instance-partition-nonce", "dfnText": "partition nonce", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-partition-nonce"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
 window.dfnpanelData['fenced-frame-config-instance-embedder-shared-storage-context'] = {"dfnID": "fenced-frame-config-instance-embedder-shared-storage-context", "url": "#fenced-frame-config-instance-embedder-shared-storage-context", "dfnText": "embedder shared storage context", "refSections": [{"refs": [{"id": "ref-for-fenced-frame-config-instance-embedder-shared-storage-context"}], "title": "2.3.3. The fenced frame config instance struct"}], "external": false};
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