firefox/mozilla-1579849.patch

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diff -up firefox-69.0/widget/gtk/WindowSurfaceWayland.cpp.old firefox-69.0/widget/gtk/WindowSurfaceWayland.cpp
--- firefox-69.0/widget/gtk/WindowSurfaceWayland.cpp.old 2019-09-11 14:34:36.687382704 +0200
+++ firefox-69.0/widget/gtk/WindowSurfaceWayland.cpp 2019-09-11 14:39:02.000391578 +0200
@@ -751,6 +751,10 @@ static bool IsPopupFullScreenUpdate(Layo
already_AddRefed<gfx::DrawTarget> WindowSurfaceWayland::Lock(
const LayoutDeviceIntRegion& aRegion) {
MOZ_ASSERT(mIsMainThread == NS_IsMainThread());
+
+ // Disable all commits from frame callback handler and delayed comit handler
+ // as we're updated by gecko compositor.
+ mPendingCommit = false;
LayoutDeviceIntRect lockedScreenRect = mWindow->GetBounds();
gfx::IntRect bounds = aRegion.GetBounds().ToUnknownRect();