--- a/gfx/layers/wr/WebRenderBridgeParent.cpp
+++ b/gfx/layers/wr/WebRenderBridgeParent.cpp
@@ -948,26 +948,20 @@ WebRenderBridgeParent::RecvGetSnapshot(P
   // We only support B8G8R8A8 for now.
   MOZ_ASSERT(buffer);
   MOZ_ASSERT(bufferTexture->GetFormat() == SurfaceFormat::B8G8R8A8);
   uint32_t buffer_size = size.width * size.height * 4;
 
   // Assert the stride of the buffer is what webrender expects
   MOZ_ASSERT((uint32_t)(size.width * 4) == stride);
 
-  mForceRendering = true;
-
-  mCompositorScheduler->FlushPendingComposite();
-  if (gfxPrefs::WebRenderAsyncSceneBuild()) {
-    mApi->FlushSceneBuilder();
-  }
+  FlushSceneBuilds();
+  FlushFrameGeneration();
   mApi->Readback(size, buffer, buffer_size);
 
-  mForceRendering = false;
-
   return IPC_OK();
 }
 
 void
 WebRenderBridgeParent::AddPipelineIdForCompositable(const wr::PipelineId& aPipelineId,
                                                     const CompositableHandle& aHandle,
                                                     const bool& aAsync)
 {