bug 1656857 comment 13: Disabling gfx.webrender.picture-caching seems to circumvent this bug on KDE (bug 1518796 was already known on KDE, I assumed it was connected to CSD regression bug 1502519. bug 1656211 seem related.) bug 1656857 comment 10: Apparently this doesn't occur with MOZ_X11_EGL=1 on KDE/X11/proprietary Nvidia.
Bug 1663273 Comment 21 Edit History
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bug 1656857 comment 13: Disabling gfx.webrender.picture-caching seems to circumvent this bug on KDE (bug 1518796 was already known on KDE, I assumed it was connected to CSD regression bug 1502519. bug 1656211 seem related. = From my view they are all the same.) bug 1656857 comment 10: Apparently this doesn't occur with MOZ_X11_EGL=1 on KDE/X11/proprietary Nvidia.