diff --git a/source b/source
index 9f3792c5dad..7b7c859aa54 100644
--- a/source
+++ b/source
@@ -78164,6 +78164,7 @@ dictionary <dfn>DragEventInit</dfn> : <span>MouseEventInit</span> {
   <ol>
    <li><p>Let <var>browsingContext</var> be the result of <span>creating a new browsing
    context</span> with <var>element</var>'s <span>node document</span>, and <var>element</var>'s
+   <span>node document</span>'s <span data-x="concept-document-bc">browsing context</span>'s
    <span>top-level browsing context</span>'s <span data-x="tlbc group">group</span>.</p></li>
 
    <li><p>Set <var>element</var>'s <span>nested browsing context</span> to
@@ -90318,9 +90319,9 @@ import "https://example.com/foo/../module2.mjs";</code></pre>
   data-x="concept-global-object-realm">realms</span> that can synchronously access each other, and
   thus needs to run in a single execution thread.</p>
 
-  <p class="note">Two <code>Window</code> objects that have the same <span>agent</span> does not
+  <p class="note">Two <code>Window</code> objects having the same <span>agent</span> does not
   indicate they can directly access all objects created in each other's realms. They would have to
-  be in <span>same origin-domain</span>, see <span>IsPlatformObjectSameOrigin</span>.</p>
+  be <span>same origin-domain</span>; see <span>IsPlatformObjectSameOrigin</span>.</p>
 
   <p>Until such a time that this standard has a better handle on lifetimes, it defines four types of
   <span data-x="agent">agents</span> that user agents must allocate at the appropriate time.</p>
@@ -90352,6 +90353,9 @@ import "https://example.com/foo/../module2.mjs";</code></pre>
    </dd>
   </dl>
 
+  <p>The allocation, lifetime, and realms of a <span data-x="similar-origin window
+  agent">similar-origin window agents</span> are defined throughout this specification.</p>
+
   <hr>
 
   <p>The <dfn data-export="">relevant agent</dfn> for a <span>platform object</span>
@@ -90414,8 +90418,8 @@ import "https://example.com/foo/../module2.mjs";</code></pre>
   <p>A <dfn data-export="">similar-origin window agent</dfn> is an <span>agent</span> whose
   [[CanBlock]] is false. </p>
 
-  <p class="note">All global objects that use this agent all have the a similar <span>origin</span>
-  and are allocated via the <span data-x="obtain-similar-origin-window-agent">obtain similar-origin
+  <p class="note">All global objects that use this agent all have a similar <span>origin</span> and
+  are allocated via the <span data-x="obtain-similar-origin-window-agent">obtain similar-origin
   window agent</span> algorithm.</p>
 
   <p>To <dfn data-x="obtain-browsing-agent-cluster">obtain a browsing context agent cluster</dfn>,