diff --git a/source b/source
index c6fe89f0786..e55247d1fcd 100644
--- a/source
+++ b/source
@@ -99976,22 +99976,6 @@ location.href = '#foo';</code></pre>
    data-x="window-navigation-api">navigation API</span>, <var>entriesForNavigationAPI</var>, and
    <var>reactivatedEntry</var>.</p></li>
 
-   <li><p>Let <var>window</var> be the <code>Window</code> whose <span data-x="concept-document-window">
-   associated <code>Document</code></span> is <var>document</var>.</p></li>
-
-   <li><p>Let <var>channels</var> be a list of <code>BroadcastChannel</code> objects whose
-   <span>relevant global object</span> is <var>window</var>.</p></li>
-
-   <li><p>Sort <var>channels</var> by the creation order, oldest first.</p></li>
-
-   <li><p>For each <var>channel</var> in <var>channels</var>:</p>
-    <ul>
-     <li><p>For each string <var>serialized</var> from <var>channel</var>'s <span>message queue</span>,
-     <span data-x="dom-BroadcastChannel-post-a-message">post a message</span> with <var>serialized</var>
-     to <var>channel</var>.</p></li>
-    </ul>
-   </li>
-
    <li>
     <p>If <var>document</var>'s <span>current document readiness</span> is "<code
     data-x="">complete</code>", and <var>document</var>'s <span>page showing</span> flag is false,
@@ -113712,9 +113696,8 @@ interface <dfn interface>BroadcastChannel</dfn> : <span>EventTarget</span> {
 
   <div w-nodev>
 
-  <p>A <code>BroadcastChannel</code> object has a <dfn>channel name</dfn>, a
-  <dfn data-x="concept-BroadcastChannel-closed">closed flag</dfn> and an initially empty <span>queue</span>
-  <dfn>message queue</dfn>.
+  <p>A <code>BroadcastChannel</code> object has a <dfn>channel name</dfn> and a <dfn
+      data-x="concept-BroadcastChannel-closed">closed flag</dfn>.</p>
 
   <p>The <dfn><code data-x="dom-BroadcastChannel">new BroadcastChannel(<var>name</var>)</code></dfn>
   constructor steps are:</p>
@@ -113816,16 +113799,8 @@ interface <dfn interface>BroadcastChannel</dfn> : <span>EventTarget</span> {
     <ul>
      <li>
       <p>If <var>destination</var>'s <span>relevant global object</span> is a <code>Window</code>
-      <var>window</var>, <span>enqueue</span> <var>serialized</var> on <span>message queue</span>.</p>
-     </li>
-
-     <li>
-      <p>If the <span data-x="list size">size</span> of <var>destination</var>'s <span>message queue</span>
-      is above a certain threshold, the user agent may <span data-x="destroy a document">destroy</span>
-      <var>window</var>'s <span data-x="concept-document-window">associated <code>Document</code></span>.</p>
-
-      <p class="note">The user agents can set their own threshold (possibly 0) to trigger the
-      <code>Document</code> destruction.</p>
+      <var>window</var>, <span data-x="destroy a document">destroy</span> <var>window</var>'s
+      <span data-x="concept-document-window">associated <code>Document</code></span>.</p>
 
       <p class="note">The <code>Document</code> to be destroyed here is not <span>fully active</span>
       (either detached or in <a href="#note-bfcache">bfcache</a>).</p>