--- a/dom/media/MediaDecoderStateMachine.cpp
+++ b/dom/media/MediaDecoderStateMachine.cpp
@@ -1905,18 +1905,21 @@ class MediaDecoderStateMachine::Complete
 public:
   explicit CompletedState(Master* aPtr) : StateObject(aPtr) { }
 
   void Enter()
   {
     // TODO : use more approriate way to decide whether need to release
     // resource in bug1367983.
 #ifndef MOZ_WIDGET_ANDROID
-    // We've decoded all samples. We don't need decoders anymore.
-    Reader()->ReleaseResources();
+    if (!mMaster->mLooping) {
+      // We've decoded all samples.
+      // We don't need decoders anymore if not looping.
+      Reader()->ReleaseResources();
+    }
 #endif
     bool hasNextFrame = (!mMaster->HasAudio() || !mMaster->mAudioCompleted)
                         && (!mMaster->HasVideo() || !mMaster->mVideoCompleted);
 
     mMaster->UpdateNextFrameStatus(
       hasNextFrame ? MediaDecoderOwner::NEXT_FRAME_AVAILABLE
                    : MediaDecoderOwner::NEXT_FRAME_UNAVAILABLE);