--- a/dom/html/HTMLMediaElement.cpp
+++ b/dom/html/HTMLMediaElement.cpp
@@ -5141,25 +5141,29 @@ void HTMLMediaElement::PlaybackEnded()
     DispatchAsyncEvent(NS_LITERAL_STRING("durationchange"));
   }
 
   if (HasAttr(kNameSpaceID_None, nsGkAtoms::loop)) {
     SetCurrentTime(0);
     return;
   }
 
-  Pause();
+  FireTimeUpdate(false);
+
+  if (!mPaused) {
+    Pause();
+    AsyncRejectPendingPlayPromises(NS_ERROR_DOM_MEDIA_ABORT_ERR);
+  }
 
   if (mSrcStream) {
     // A MediaStream that goes from inactive to active shall be eligible for
     // autoplay again according to the mediacapture-main spec.
     mAutoplaying = true;
   }
 
-  FireTimeUpdate(false);
   DispatchAsyncEvent(NS_LITERAL_STRING("ended"));
 }
 
 void HTMLMediaElement::SeekStarted()
 {
   DispatchAsyncEvent(NS_LITERAL_STRING("seeking"));
 }