Add muted/readyState checks and fingerprint notes

index.html

@@ -460,18 +460,27 @@ <h2>Exposing change of MediaStreamTrack configuration</h2>
 };</pre>
     <p>
       <p>When the [=User Agent=] detects <dfn data-export id="change-track-configuration">a change of configuration</dfn>
-       in a <var>track</var>'s underlying source, the [=User Agent=] MUST queue a task that runs the following steps:</p>
+       in a <var>track</var>'s underlying source, the [=User Agent=] MUST run the following steps:</p>
       <ol>
+        <li><p>If <var>track</var>.{{MediaStreamTrack/muted}} is <code>true</code>, wait for <var>track</var>.{{MediaStreamTrack/muted}}
+          to become <code>false</code> or <var>track</var>.{{MediaStreamTrack/readyState}} to be "ended".</p></li>
+        <li><p>If <var>track</var>.{{MediaStreamTrack/readyState}} is "ended", abort these steps.</p></li>
+        <li><p>If <var>track</var>'s capabilities, constraints and settings are matching <var>source</var> configuration, abort these steps.
         <li>
           <!-- FIXME: Export capabilities, constraints and settings so that we can use them here. -->
-          <p>Update <var>track</var>'s capabilities, constraints and settings
-            according <var>track</var>'s underlying source.</p>
+          <p>Update <var>track</var>'s capabilities, constraints and settings according <var>track</var>'s underlying source.</p>
         </li>
         <li>
-          <p>[=Fire an event=] named <var>configurationchanged</var> on <var>track</var>.</p>
+          <p>[=Fire an event=] named <var>configurationchange</var> on <var>track</var>.</p>
         </li>
       </ol>
     </p>
+    <p>
+      <div class="note">
+        <p class="fingerprint">These events are potentially triggered simultaneously on documents of different origins.
+          [=User Agents=] MAY add fuzzing on the timing of events to avoid cross-origin activity correlation.</p>
+      </div>
+    </p>
     </div>
   </section>
 </body>