--- a/dom/html/TextTrackManager.cpp
+++ b/dom/html/TextTrackManager.cpp
@@ -271,28 +271,28 @@ TextTrackManager::UpdateCueDisplay()
   }
 
   nsCOMPtr<nsIContent> overlay = videoFrame->GetCaptionOverlay();
   nsCOMPtr<nsIContent> controls = videoFrame->GetVideoControls();
   if (!overlay) {
     return;
   }
 
-  nsTArray<RefPtr<TextTrackCue> > activeCues;
-  mTextTracks->GetShowingCues(activeCues);
+  nsTArray<RefPtr<TextTrackCue> > showingCues;
+  mTextTracks->GetShowingCues(showingCues);
 
-  if (activeCues.Length() > 0) {
+  if (showingCues.Length() > 0) {
     WEBVTT_LOG("UpdateCueDisplay ProcessCues");
-    WEBVTT_LOGV("UpdateCueDisplay activeCues.Length() %" PRIuSIZE, activeCues.Length());
+    WEBVTT_LOGV("UpdateCueDisplay showingCues.Length() %" PRIuSIZE, showingCues.Length());
     RefPtr<nsVariantCC> jsCues = new nsVariantCC();
 
     jsCues->SetAsArray(nsIDataType::VTYPE_INTERFACE,
                        &NS_GET_IID(nsIDOMEventTarget),
-                       activeCues.Length(),
-                       static_cast<void*>(activeCues.Elements()));
+                       showingCues.Length(),
+                       static_cast<void*>(showingCues.Elements()));
     nsPIDOMWindowInner* window = mMediaElement->OwnerDoc()->GetInnerWindow();
     if (window) {
       sParserWrapper->ProcessCues(window, jsCues, overlay, controls);
     }
   } else if (overlay->Length() > 0) {
     WEBVTT_LOG("UpdateCueDisplay EmptyString");
     nsContentUtils::SetNodeTextContent(overlay, EmptyString(), true);
   }

--- a/dom/media/TextTrackList.cpp
+++ b/dom/media/TextTrackList.cpp
@@ -38,19 +38,22 @@ TextTrackList::TextTrackList(nsPIDOMWind
 
 TextTrackList::~TextTrackList()
 {
 }
 
 void
 TextTrackList::GetShowingCues(nsTArray<RefPtr<TextTrackCue> >& aCues)
 {
+  // Only Subtitles and Captions can show on the screen.
   nsTArray< RefPtr<TextTrackCue> > cues;
   for (uint32_t i = 0; i < Length(); i++) {
-    if (mTextTracks[i]->Mode() == TextTrackMode::Showing) {
+    if (mTextTracks[i]->Mode() == TextTrackMode::Showing &&
+        (mTextTracks[i]->Kind() == TextTrackKind::Subtitles ||
+         mTextTracks[i]->Kind() == TextTrackKind::Captions)) {
       mTextTracks[i]->GetActiveCueArray(cues);
       aCues.AppendElements(cues);
     }
   }
 }
 
 JSObject*
 TextTrackList::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)