--- a/dom/media/MediaDecoderStateMachine.cpp
+++ b/dom/media/MediaDecoderStateMachine.cpp
@@ -1902,17 +1902,22 @@ DecodingFirstFrameState::Enter()
   if (mMaster->mSentFirstFrameLoadedEvent) {
     SetState<DecodingState>();
     return;
   }
 
   MOZ_ASSERT(!mMaster->mVideoDecodeSuspended);
 
   // Dispatch tasks to decode first frames.
-  mMaster->DispatchDecodeTasksIfNeeded();
+  if (mMaster->HasAudio()) {
+    mMaster->RequestAudioData();
+  }
+  if (mMaster->HasVideo()) {
+    mMaster->RequestVideoData(false, media::TimeUnit());
+  }
 }
 
 void
 MediaDecoderStateMachine::
 DecodingFirstFrameState::HandleAudioNotDecoded(const MediaResult& aError)
 {
   switch (aError.Code()) {
     case NS_ERROR_DOM_MEDIA_WAITING_FOR_DATA: