Firefox using 100% CPU usage when viewing YT video's at 4k/60

Brumboy · 10 Dec 2020 at 11:20

Hi so is it normal for Firefox and YouTube to use 100% CPU when viewing 4k/60 video's?

I have a 5600x so I'm a bit confused.

What settings can be used to bring this usage down?

Thank you

alec · 10 Dec 2020 at 11:24

Looks like it is not using hardware acceleration. What GPU?

Glanza · 10 Dec 2020 at 12:53

Have you enabled Webrender on FF?

Orcvader · 11 Dec 2020 at 11:49

As above, it will also depend on the GPU you're using. If the GPU does not have a VP9 decoder then Firefox and any other browser will dump the workload on the CPU instead.

opethdisciple · 14 Dec 2020 at 22:58

Interesting thread. I am not seeing high CPU usage but high GPU usage especially on the here: https://www.skysports.com/football

Primarily on my 3570k and GT 710 pc.

This right here causes me high GPU usage.

Its the dynamic banners on the side of the webpage.

I fired up Edge and even the snow flakes in the banner are faster!

Brumboy · 15 Dec 2020 at 10:34

Sorry forgot to reply!

I have fixed it. I downloaded enhanced-h264ify

And tried different combo's of codecs until it worked for my setup!

Cheers guys