--- a/dom/html/HTMLMediaElement.cpp
+++ b/dom/html/HTMLMediaElement.cpp
@@ -5566,16 +5566,24 @@ HTMLMediaElement::UpdateReadyStateIntern
   }
 
   if (nextFrameStatus == NEXT_FRAME_UNAVAILABLE_BUFFERING) {
     // Force HAVE_CURRENT_DATA when buffering.
     ChangeReadyState(nsIDOMHTMLMediaElement::HAVE_CURRENT_DATA);
     return;
   }
 
+  // TextTracks must be loaded for the HAVE_ENOUGH_DATA and
+  // HAVE_FUTURE_DATA.
+  // So force HAVE_CURRENT_DATA if text tracks not loaded.
+  if (mTextTrackManager && !mTextTrackManager->IsLoaded()) {
+    ChangeReadyState(nsIDOMHTMLMediaElement::HAVE_CURRENT_DATA);
+    return;
+  }
+
   if (mDownloadSuspendedByCache && mDecoder && !mDecoder->IsEnded()) {
     // The decoder has signaled that the download has been suspended by the
     // media cache. So move readyState into HAVE_ENOUGH_DATA, in case there's
     // script waiting for a "canplaythrough" event; without this forced
     // transition, we will never fire the "canplaythrough" event if the
     // media cache is too small, and scripts are bound to fail. Don't force
     // this transition if the decoder is in ended state; the readyState
     // should remain at HAVE_CURRENT_DATA in this case.