--- a/gfx/layers/opengl/TexturePoolOGL.cpp
+++ b/gfx/layers/opengl/TexturePoolOGL.cpp
@@ -26,16 +26,23 @@ static mozilla::LazyLogModule gTexturePo
 namespace mozilla {
 namespace gl {
 
 static GLContext* sActiveContext = nullptr;
 
 static Monitor* sMonitor = nullptr;
 static nsDeque* sTextures = nullptr;
 
+enum class PoolState : uint8_t {
+  NOT_INITIALIZE,
+  INITIALIZED,
+  SHUTDOWN
+};
+static PoolState sPoolState = PoolState::NOT_INITIALIZE;
+
 static bool sHasPendingFillTask = false;
 
 #ifdef MOZ_WIDGET_ANDROID
 
 class GeckoSurfaceTextureSupport final
     : public java::GeckoSurfaceTexture::Natives<GeckoSurfaceTextureSupport>
 {
 public:
@@ -60,17 +67,18 @@ void TexturePoolOGL::MaybeFillTextures()
         [] () {
           TexturePoolOGL::Fill(sActiveContext);
     }));
   }
 }
 
 GLuint TexturePoolOGL::AcquireTexture()
 {
-  NS_ASSERTION(sMonitor, "not initialized");
+  MOZ_ASSERT(sPoolState != PoolState::NOT_INITIALIZE, "not initialized");
+  MOZ_ASSERT(sPoolState != PoolState::SHUTDOWN, "should not be called after shutdown");
 
   MonitorAutoLock lock(*sMonitor);
 
   if (!sActiveContext) {
     // Wait for a context
     sMonitor->Wait();
 
     if (!sActiveContext)
@@ -117,18 +125,19 @@ static void Clear()
       sActiveContext->fDeleteTextures(1, item);
     }
     delete item;
   }
 }
 
 void TexturePoolOGL::Fill(GLContext* aContext)
 {
-  NS_ASSERTION(aContext, "NULL GLContext");
-  NS_ASSERTION(sMonitor, "not initialized");
+  MOZ_ASSERT(aContext, "NULL GLContext");
+  MOZ_ASSERT(sPoolState != PoolState::NOT_INITIALIZE, "not initialized");
+  MOZ_ASSERT(sPoolState != PoolState::SHUTDOWN, "should not be called after shutdown");
 
   MonitorAutoLock lock(*sMonitor);
   sHasPendingFillTask = false;
 
   if (sActiveContext != aContext) {
     Clear();
     sActiveContext = aContext;
   }
@@ -152,26 +161,30 @@ void TexturePoolOGL::Fill(GLContext* aCo
 
 GLContext* TexturePoolOGL::GetGLContext()
 {
   return sActiveContext;
 }
 
 void TexturePoolOGL::Init()
 {
+  MOZ_ASSERT(sPoolState != PoolState::INITIALIZED);
   sMonitor = new Monitor("TexturePoolOGL.sMonitor");
   sTextures = new nsDeque();
 
 #ifdef MOZ_WIDGET_ANDROID
   if (jni::IsAvailable()) {
     GeckoSurfaceTextureSupport::Init();
   }
 #endif
+  sPoolState = PoolState::INITIALIZED;
 }
 
 void TexturePoolOGL::Shutdown()
 {
+  MOZ_ASSERT(sPoolState == PoolState::INITIALIZED);
+  sPoolState = PoolState::SHUTDOWN;
   delete sMonitor;
   delete sTextures;
 }
 
 } // namespace gl
 } // namespace mozilla