Interestingly enough this causes all kind of weird distortion on my brand new 16" MBP. Not sure if it's a hardware issue, but it only happens in the browser with GPU acceleration turned on...
hardware acceleration has been supported in FF since 75. however your display scaling has to be 100% on x-org or use it in wayland. Linux desktop would've been perfect if it weren't for the fragmentation. btw currently running ubuntu 20.04