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Saw this ghacks article for speeding up YouTube on FF and seems to help. (www.ghacks.net)
submitted 11 months ago by to c/firefox@lemmy.ml
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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)

*edit - per Zak in the comments. The AMD setting is Windows specific.

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[–] 9 points 11 months ago (1 child)

media.wmf.zero-copy-nv12-textures-force-enabled

This option is Windows-specific.

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  • [–] 4 points 11 months ago

    but it still works. i tried setting it just now and the video loads immediately now, but interestingly, the rest of the youtube contents still takes a second to load. before it also took a second for the video to load; not enough to make me stop using it, but it was noticeable.

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