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Saw this ghacks article for speeding up YouTube on FF and seems to help. (www.ghacks.net)
submitted 9 months ago by otter@lemmy.ca to c/opensource@programming.dev
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cross-posted from: https://lemmy.ml/post/39446054

I have seen folks talk about a pain point for using FF (or forks) being related to YouTube being super slow. The about:config settings the article mentions did seem to lead to YouTube loading faster on both my FF and Zen-Browser installs. So maybe this might help for others that specifically don't like to use FF as their main browser because of YouTube.

For those that just want the settings:

gfx.webrender.compositor.force-enabled (set to true and restart FF)

If on AMD GPU, this extra setting is supposed to help reduce CPU usage:

media.wmf.zero-copy-nv12-textures-force-enabled (set to true and restart FF)

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[-] Kissaki@programming.dev 2 points 9 months ago

YouTube recently introduced UI changes. Google probably didn't optimize for Firefox besides Chrome. Whatever they're doing, it may be more performance on Chrome than on Firefox for technical reasons.

this post was submitted on 25 Nov 2025
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