Windows 10 reached EOS (end of support) on October 14, 2025. For more information, see this article.

Sykje yn Support

Mij stipescams. Wy sille jo nea freegje in telefoannûmer te beljen, der in sms nei ta te stjoeren of persoanlike gegevens te dielen. Meld fertochte aktiviteit mei de opsje ‘Misbrûk melde’.

Mear ynfo

Dizze konversaasje is argivearre. Stel in nije fraach as jo help nedich hawwe.

youtube videos stuttering/lagging

  • 4 antwurd
  • 7 hawwe dit probleem
  • 381 werjeftes
  • Lêste antwurd fan Xtffox

This might be asked before. Internet explorer 11 plays youtube videos without any lag or stuttering issue at all. but as I played the same video in FF, I immediately notice stutter. using FF ver64 on win8.1 64bit. Tried enble/disable HW acceleration, extensions, but no joy.

Is Mozilla aware of this?

This might be asked before. Internet explorer 11 plays youtube videos without any lag or stuttering issue at all. but as I played the same video in FF, I immediately notice stutter. using FF ver64 on win8.1 64bit. Tried enble/disable HW acceleration, extensions, but no joy. Is Mozilla aware of this?

Keazen oplossing

YouTube prefers a codec that can put heavy stress on your CPU called VP9. You can hide Firefox's ability to handle VP9 so that YouTube gives you H.264/MP4 instead and see whether that resolves it. This extension will do the job:

https://addons.mozilla.org/firefox/addon/h264ify/

Any difference?

Dit antwurd yn kontekst lêze 👍 2

Alle antwurden (4)

Keazen oplossing

YouTube prefers a codec that can put heavy stress on your CPU called VP9. You can hide Firefox's ability to handle VP9 so that YouTube gives you H.264/MP4 instead and see whether that resolves it. This extension will do the job:

https://addons.mozilla.org/firefox/addon/h264ify/

Any difference?

high end pc with no noticeable load on cpu but still suffer lag. it seems that was the cause. anyway thanks so much jscher2000

The new Firefox 64.0.2 update may help with the Youtube stuttering.

https://www.mozilla.org/firefox/64.0.2/releasenotes/

finally they fixed it .....thanks James.