We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Firefox massive frame drops when playing Youtube 8k video

  • 7 iimpendulo
  • 1 inayo le ngxaki
  • 1 view
  • Impendulo yokugqibela ngu V4kodin

more options

Firefox use 100% of my cpu and drops frames when playing 8k video (gpu acceleration setting is turned on). Chrome instead have no frame drops and does not use 100% of the cpu.

I tried to google it and use some solution, but no effect in my case.

hardware: cpu: ryzen 5600x gpu: rtx 4070 ram: 32 gb monitor: LC27 JG50QQIXCI (qhd 16:9 144hz)


PS: 1st picture firefox, 2nd chrome.

Firefox use 100% of my cpu and drops frames when playing 8k video (gpu acceleration setting is turned on). Chrome instead have no frame drops and does not use 100% of the cpu. I tried to google it and use some solution, but no effect in my case. hardware: cpu: ryzen 5600x gpu: rtx 4070 ram: 32 gb monitor: LC27 JG50QQIXCI (qhd 16:9 144hz) PS: 1st picture firefox, 2nd chrome.
Iqhotyoshelwe imifanekiso ekwisikrini

Isisombulu esikhethiweyo

zeroknight said

Visit about:support in the address bar and check the status of the AV1 codec in the "Codec Support Information" section.

Thank you for leading me to the answer. I just need to install av1 codec support from ms store.

Funda le mpendulo kwimeko leyo 👍 2

All Replies (7)

more options
more options

Also, I'm using latest 121.0 64 bit Firefox version

Ilungisiwe ngu V4kodin

more options

V4kodin said

PS: 1st picture firefox, 2nd chrome.

PS: 2nd picture firefox, 1st chrome.*

more options

Visit about:support in the address bar and check the status of the AV1 codec in the "Codec Support Information" section.

more options

zeroknight said

Visit about:support in the address bar and check the status of the AV1 codec in the "Codec Support Information" section.

I think this value is not set

more options

media.wmf.av1.enabled is set to true

more options

Isisombululo esiKhethiweyo

zeroknight said

Visit about:support in the address bar and check the status of the AV1 codec in the "Codec Support Information" section.

Thank you for leading me to the answer. I just need to install av1 codec support from ms store.