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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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[–] ares35@kbin.social 6 points 1 year ago (1 children)

i have over a dozen addons in firefox, several user scripts (including ones that run on yt). i never log in.

i can q-up a days-long playlist and it'll just go and go. no problems.

[–] Papercrane@feddit.de 1 points 1 year ago (2 children)

Can you also watch twitch at 1080p without lag? Maybe you don't watch it, but I always had problems with that. Chrome works perfectly on twitch but not Firefox

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

Firefox plays 1080p twitch streams just fine for me on several machines.

[–] Papercrane@feddit.de 1 points 1 year ago (1 children)

Hmmm, maybe my PC just sucks :'/

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

It could be many things.

Do you have a lot of extensions enabled?
Is your Firefox updated?
Is xmp or docp enabled so your ram is running at the right speeds?
Is hardware acceleration enabled/disabled in firefox?
Have you tried a fresh firefox profile/install? you could try downloading a beta/dev version and testing with that.

[–] Papercrane@feddit.de 1 points 1 year ago

I have like 9 extensions, Firefox is always updated. I don't know but I have 8gb ddr2 ram (10 year old PC), I don't think I enabled hardware acceleration. I have not tried a new install.

[–] ares35@kbin.social 1 points 1 year ago

i can watch 1080p content just fine on my geriatric pc (1st gen lynnfield), and even do h264 encoding in realtime or faster (sw ffmpeg), but discord and twitch just flat-out suck on it.

[–] BananaTrifleViolin@kbin.social 1 points 1 year ago

I watch twitch at 1080p and YouTube at 4K with Firefox on Windows and Linux (same PC) without issue.