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Firefox is unbelievably slow when I'm watching youtube videos (lemmy.ml)

submitted 1 year ago* (last edited 1 year ago) by Yoru@lemmy.ml to c/firefox@lemmy.ml

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I have about 25 extensions (almost all needed) and firefox lags like crazy, it's like I'm watching the videos at 10 fps. I download chrome to test it out and sure enough it runs as smooth as butter. Any help?

EDIT: It somehow fixed itself after I started using LibreWolf (with the same addons)

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[–] capt_wolf@lemmy.world 19 points 1 year ago (1 children)

Could be any number of things. Possibly a bad plug in or combination of plug-ins. Could be your new video card didn't jive with your installation of Firefox.

Run Firefox in safe mode and see if the performance improves. If it does, you likely have a plugin causing the issue. From there, disable all of them and reenable them one at a time to see if the problem comes back.

Disable and reenable hardware acceleration.

Disable ipv6 This is an issue I ran into earlier this year.

Clear cache and cookies

And last resort, Uninstall Firefox and all profiles and settings and reinstall a fresh copy. (after syncing your account, obviously)

[–] rastilin@kbin.social 2 points 1 year ago (1 children)

I always run with hardware acceleration off on all my Firefox machines, it seems to cause a lot of issues and the videos play just fine without it.

[–] capt_wolf@lemmy.world 7 points 1 year ago

Depends on the setup. Disabling it on mine turns Firefox into a slideshow.