diff --git a/source b/source
index af28d21866f..2529743aa6e 100644
--- a/source
+++ b/source
@@ -85167,8 +85167,8 @@ dictionary <dfn>PageTransitionEventInit</dfn> : <span>EventInit</span> {
     <p>Things that can cause the page to be unsalvageable include:</p>
 
     <ul class="brief">
-     <li>Listening for <code data-x="event-beforeunload">beforeunload</code> events
-     <li>Listening for <code data-x="event-unload">unload</code> events
+     <li>The user agent decided to not keep the <code>Document</code> alive in a <span>session
+     history entry</span> after <span data-x="unload a document">unload</span>
      <li>Having <code>iframe</code>s that are not salvageable
      <li>Active <code>WebSocket</code> objects
      <li><span data-x="abort a document">Aborting a <code>Document</code></span>
@@ -85220,12 +85220,12 @@ dictionary <dfn>PageTransitionEventInit</dfn> : <span>EventInit</span> {
 
   <p>A <code>Document</code> has a <dfn
   data-x="concept-document-salvageable"><i>salvageable</i></dfn> state, which must initially be
-  true, a <dfn>fired unload</dfn> flag, which must initially be false, and a <dfn>page showing</dfn>
-  flag, which must initially be false. The <span>page showing</span> flag is used to ensure that
-  scripts receive <code data-x="event-pageshow">pageshow</code> and <code
-  data-x="event-pagehide">pagehide</code> events in a consistent manner (e.g. that they never
-  receive two <code data-x="event-pagehide">pagehide</code> events in a row without an intervening
-  <code data-x="event-pageshow">pageshow</code>, or vice versa).</p>
+  true, and a <dfn>page showing</dfn> flag, which must initially be false. The <span>page
+  showing</span> flag is used to ensure that scripts receive <code
+  data-x="event-pageshow">pageshow</code> and <code data-x="event-pagehide">pagehide</code> events
+  in a consistent manner (e.g. that they never receive two <code
+  data-x="event-pagehide">pagehide</code> events in a row without an intervening <code
+  data-x="event-pageshow">pageshow</code>, or vice versa).</p>
 
   <p><span data-x="event loop">Event loops</span> have a <dfn>termination nesting level</dfn>
   counter, which must initially be 0.</p>
@@ -85253,10 +85253,6 @@ dictionary <dfn>PageTransitionEventInit</dfn> : <span>EventInit</span> {
    <li><p>Decrease the <span>event loop</span>'s <span>termination nesting level</span> by
    1.</p></li>
 
-   <li><p>If any event listeners were triggered by the earlier <i>dispatch</i> step, then set
-   <var>document</var>'s <i data-x="concept-document-salvageable">salvageable</i> state to
-   false.</p></li>
-
    <li>
     <p>If <var>document</var>'s <span>active sandboxing flag set</span> does not have its
     <span>sandboxed modals flag</span> set, and the <code
@@ -85292,15 +85288,11 @@ dictionary <dfn>PageTransitionEventInit</dfn> : <span>EventInit</span> {
 
       <ol>
        <li><p><span>Prompt to unload</span> <var>browsingContext</var>'s <span>active
-       document</span> with the <var>recursiveFlag</var> set. If the user <span>refused to allow
-       the document to be unloaded</span>, then the user implicitly also <span data-x="refused to
-       allow the document to be unloaded">refused to allow <var>document</var> to be
-       unloaded</span>; <span>break</span>.</p></li>
-
-       <li><p>If the <i data-x="concept-document-salvageable">salvageable</i> state of
-       <var>browsingContext</var>'s <span>active document</span> is false, then set the <i
-       data-x="concept-document-salvageable">salvageable</i> state of <var>document</var> to
-       false.</p></li>
+       document</span> with the <var>recursiveFlag</var> set.</p></li>
+
+       <li><p>If the user <span>refused to allow the document to be unloaded</span>, then the user
+       implicitly also <span data-x="refused to allow the document to be unloaded">refused to allow
+       <var>document</var> to be unloaded</span>; <span>break</span>.</p></li>
       </ol>
      </li>
     </ol>
@@ -85327,6 +85319,11 @@ dictionary <dfn>PageTransitionEventInit</dfn> : <span>EventInit</span> {
 
    <li><p>Set <var>document</var>'s <span>page showing</span> flag to false.</p></li>
 
+   <li><p>If the user agent does not intend to keep <var>document</var> alive
+   in a <span>session history entry</span> (such that it can be reused later on <span
+   data-x="traverse the history">history traversal</span>), set <var>document</var>'s
+   <i data-x="concept-document-salvageable">salvageable</i> state to false.</p></li>
+
    <li><p><span data-x="concept-event-fire">Fire an event</span> named <code
    data-x="event-pagehide">pagehide</code> at <var>document</var>'s <span>relevant global
    object</span>, using <code>PageTransitionEvent</code>, with the <code
@@ -85342,18 +85339,15 @@ dictionary <dfn>PageTransitionEventInit</dfn> : <span>EventInit</span> {
     <ref spec=PAGEVIS></p>
    </li>
 
-   <li><p><i>Unload event</i>: If <var>document</var>'s <span>fired unload</span> flag is
-   false, then <span data-x="concept-event-fire">fire an event</span> named <code
-   data-x="event-unload">unload</code> at <var>document</var>'s <span>relevant global object</span>,
-   with <var>legacy target override flag</var> set.</p></li>
+   <li><p><i>Unload event</i>: If <var>document</var>'s <i
+   data-x="concept-document-salvageable">salvageable</i> state is false, then <span
+   data-x="concept-event-fire">fire an event</span> named <code data-x="event-unload">unload</code>
+   at <var>document</var>'s <span>relevant global object</span>, with <var>legacy target override
+   flag</var> set.</p></li>
 
    <li><p>Decrease the <span>event loop</span>'s <span>termination nesting level</span> by
    one.</p></li>
 
-   <li><p>If any event listeners were triggered by the earlier <i>unload event</i> step, then set
-   <var>document</var>'s <i data-x="concept-document-salvageable">salvageable</i> state
-   to false and set <var>document</var>'s <span>fired unload</span> flag to true.</p></li>
-
    <li><p>Run any <span>unloading document cleanup steps</span> for <var>document</var> that are
    defined by this specification and <span>other applicable specifications</span>.</p></li>