FWIW, this is a bug in the Apple graphics driver. Apple has known about this bug for over 2 years and has not fixed it yet. Mozilla developers have been bitten by this Apple driver bug and reported it to Apple over 2 years ago.
So I would not hold my breath waiting for a fix from Apple as they do not seem to care about older versions of macOS and older equipment. Their eyes are on Big Sir and Arm64 processors and their own gpus.
Last edited by KevinH; 11-04-2021 at 04:12 PM.
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