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I wonder if your Firefox is using hardware accelerated video. I know for me I had to play with some about:config knobs before Firefox actually started using har

I wonder if your Firefox is using hardware accelerated video. I know for me I had to play with some about:config knobs before Firefox actually started using hardware accelerated video. It is enabled by default on macOS and Windows, however on Linux it is not. Ensuring that Firefox was using hardware acceleration for video for me improved the performance and battery life enormously.

ttarr 5y ago
Firefox was just an example, anything that's heavy on the GPU yields the same problem, and yes I did have the right knobs enabled on Firefox and can confirm that HW was indeed working. Recently however I had to disable it, see https://bugzilla.mozilla.org/show_bug.cgi?id=1759947 https://bugzilla.mozilla.org/show_bug.cgi?id=1759947