Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

YouTube 4K video playback performance issue on Windows 11

  • 5 replies
  • 1 has this problem
  • 1 view
  • Last reply by mingsun123

mingsun123
mingsun123
more options

I had been using Firefox browser for awhile, but because of playback performance issue, I have to using another browser just for video playing, especially for 4K video.

Compared to Edge, Firefox seems taking more resources to playback the YouTube video and more heat. When look at the Task Manager, the Video Processing is 0%, and GPU is running significantly more resources on '3D'.

I had been using Firefox browser for awhile, but because of playback performance issue, I have to using another browser just for video playing, especially for 4K video. Compared to Edge, Firefox seems taking more resources to playback the YouTube video and more heat. When look at the Task Manager, the Video Processing is 0%, and GPU is running significantly more resources on '3D'.

Chosen solution

The issue has been resolved after updated to Firefox 100.

Thanks.

Read this answer in context 👍 0

All Replies (5)

mingsun123
mingsun123 Question owner
more options

This is the screenshots I got, the image from the left is from Firefox & next is from Edge. The YouTube Links: here

Modified by mingsun123

-elison-
-elison-
more options

mingsun123 said

Hello! Does it still happen in Troubleshoot Mode?: Diagnose Firefox issues using Troubleshoot Mode

mingsun123
mingsun123 Question owner
more options

-elison- said

mingsun123 said

Hello! Does it still happen in Troubleshoot Mode?: Diagnose Firefox issues using Troubleshoot Mode

It even worst, and video playback was lagging.

mingsun123
mingsun123 Question owner
more options

donthavecow said
You said Windows 11 but your screenshot is showing Mac?

That is the video....

mingsun123
mingsun123 Question owner
more options

Chosen Solution

The issue has been resolved after updated to Firefox 100.

Thanks.