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All the flags to force using acceleration are enabled, but the section with the Graphics driver shows that no driver was found. I do have the latest Nvidia Drivers installed, and my graphic card is a GeForce GTX 1660 Ti Mobile.

* Running Firefox 93.0

*Update: I've rebooted my system, and it shows that my Graphic Card is now in use. Not sure which flag I enabled helped, but pages are buttery smooth as with Chrome. Many thanks!

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If you'd flipped any graphics flags in about:config, system reboot was probably overkill (unless you'd updated system drivers too).

Most likely just needed to restart Firefox. But glad you got it working.

And yeah, both Chrome and Firefox on Linux can be rather finicky with graphics cards due to high levels of unreliability in the past. Although the situation has improved over time.

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