--- a/gfx/webrender_bindings/RenderCompositorANGLE.cpp
+++ b/gfx/webrender_bindings/RenderCompositorANGLE.cpp
@@ -80,18 +80,21 @@ RenderCompositorANGLE::Initialize()
 
     DXGI_SWAP_CHAIN_DESC1 desc{};
     desc.Width = 0;
     desc.Height = 0;
     desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
     desc.SampleDesc.Count = 1;
     desc.SampleDesc.Quality = 0;
     desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
-    desc.BufferCount = 2;
-    desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
+    // Do not use DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL, since it makes HWND unreusable.
+    //desc.BufferCount = 2;
+    //desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
+    desc.BufferCount = 1;
+    desc.SwapEffect = DXGI_SWAP_EFFECT_SEQUENTIAL;
     desc.Scaling = DXGI_SCALING_NONE;
     desc.Flags = 0;
 
     HRESULT hr = dxgiFactory2->CreateSwapChainForHwnd(mDevice, hwnd, &desc,
                                                       nullptr, nullptr,
                                                       getter_AddRefs(swapChain1));
     if (SUCCEEDED(hr) && swapChain1) {
       DXGI_RGBA color = { 1.0f, 1.0f, 1.0f, 1.0f };