Win10, GTX1060 I can reproduce, but -so far- only with gfx.webrender.split-render-roots;true: Play the video on https://bugzilla.mozilla.org/show_bug.cgi?id=1548247 and go fullscreen. bp-7fa21db6-ba9f-4199-bc8b-247600190502
Bug 1538540 Comment 36 Edit History
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Win10, GTX1060 I can reproduce, but -so far- only with gfx.webrender.split-render-roots;true: Play the video on https://bugzilla.mozilla.org/show_bug.cgi?id=1548247 and go fullscreen. bp-7fa21db6-ba9f-4199-bc8b-247600190502 Edit: Debian Testing, KDE, X11, Macbook Pro: bp-3fe21d28-8156-4de4-8209-0cc180190502