--- a/gfx/vr/gfxVRExternal.cpp
+++ b/gfx/vr/gfxVRExternal.cpp
@@ -112,21 +112,55 @@ VRDisplayExternal::StartPresentation()
   mTelemetry.Clear();
   mTelemetry.mPresentationStart = TimeStamp::Now();
 
   // Indicate that we are ready to start immersive mode
   mBrowserState.presentationActive = true;
   mBrowserState.layerState[0].type = VRLayerType::LayerType_Stereo_Immersive;
   PushState();
 
+#if defined(MOZ_WIDGET_ANDROID)
+  /**
+   * Android compositor is paused when presentation starts. That causes VRManager::NotifyVsync() not to be called.
+   * We post a VRTask to call VRManager::NotifyVsync() while the compositor is paused on Android.
+   * VRManager::NotifyVsync() should be called constinuosly while the compositor is paused because Gecko WebVR Architecture
+   * relies on that to act as a "watchdog" in order to avoid render loop stalls and recover from SubmitFrame call timeouts.
+   */
+  PostVRTask();
+#endif
   // TODO - Implement telemetry:
 
   // mTelemetry.mLastDroppedFrameCount = stats.m_nNumReprojectedFrames;
 }
 
+#if defined(MOZ_WIDGET_ANDROID)
+void
+VRDisplayExternal::PostVRTask() {
+  MessageLoop * vrLoop = VRListenerThreadHolder::Loop();
+  if (!vrLoop || !mBrowserState.presentationActive) {
+    return;
+  }
+  RefPtr<Runnable> task = NewRunnableMethod(
+    "VRDisplayExternal::RunVRTask",
+    this,
+    &VRDisplayExternal::RunVRTask);
+  VRListenerThreadHolder::Loop()->PostDelayedTask(task.forget(), 50);
+}
+
+void
+VRDisplayExternal::RunVRTask() {
+  if (mBrowserState.presentationActive) {
+    VRManager *vm = VRManager::Get();
+    vm->NotifyVsync(TimeStamp::Now());
+    PostVRTask();
+  }
+}
+
+#endif // defined(MOZ_WIDGET_ANDROID)
+
 void
 VRDisplayExternal::StopPresentation()
 {
   if (!mBrowserState.presentationActive) {
     return;
   }
   sPushIndex = 0;
 

--- a/gfx/vr/gfxVRExternal.h
+++ b/gfx/vr/gfxVRExternal.h
@@ -55,16 +55,18 @@ protected:
 
 private:
   bool PopulateLayerTexture(const layers::SurfaceDescriptor& aTexture,
                             VRLayerTextureType* aTextureType,
                             VRLayerTextureHandle* aTextureHandle);
   void PushState(bool aNotifyCond = false);
 #if defined(MOZ_WIDGET_ANDROID)
   bool PullState(const std::function<bool()>& aWaitCondition = nullptr);
+  void PostVRTask();
+  void RunVRTask();
 #else
   bool PullState();
 #endif
 
   VRTelemetry mTelemetry;
   TimeStamp mVRNavigationTransitionEnd;
   VRBrowserState mBrowserState;
   VRHMDSensorState mLastSensorState;