2077063 - Performance Issue when watching multiple streams

Status: RESOLVED INCOMPLETE

(Core :: Audio/Video: Playback, defect)

Description

[work.sensation915]

My beloved Firefox devs,

I would like to report a serious performance issue with Firefox when watching multiple live streams simultaneously.

First, I want to make it clear that this is not a problem with my computer and not a problem with my internet speed. ( 16 gb ram, fast cpu, fast gpu, fast internet ).

I currently have:

2 Kick streams running at 1080p

3 live camera streams on other websites, also at 1080p

When running this configuration in Firefox, the streams become extremely laggy and eventually almost unwatchable. Playback stutters heavily and Firefox becomes noticeably less responsive.

However, when I use the exact same configuration—the same 2 Kick streams and the same 3 live camera streams—on other browsers, everything works flawlessly.

This strongly suggests that the issue is related to Firefox's performance, video handling, streaming implementation, or resource management rather than my PC or internet connection.

I love using Firefox, but if other browsers can handle the exact same workload significantly better, that becomes a** major problem**. Users shouldn't have to switch browsers simply because Firefox struggles with multiple 1080p streams while another browser handles them without noticeable issues.

While UI improvements and redesigns are important, introducing a new pill-shaped interface is much less important to me than having a browser that performs reliably under demanding workloads. A modern-looking interface doesn't help much if the browser struggles with basic performance tasks such as handling multiple high-quality live streams. !!!

I genuinely want to stay with Firefox, but performance is becoming an increasingly important factor. If competing browsers consistently provide better performance for the same tasks, it makes it difficult to justify continuing to use Firefox.

Thank you for taking the time to investigate this issue and for continuing to improve Firefox.

Comment 1

[Mike Conley (:mconley) (:⚙️)]

Thank you for filing! I think we need some more information to determine what's happening here.

If you can reproduce this reliably, are you willing to share with us a performance profile? That's usually the easiest way for us to determine why you're experiencing sub-par performance.

Comment 2

[media-triaging-bot]

Thanks for the details.

Please capture a profile:

1. Open about:logging.
2. On the Logging presets tab, choose the "Media playback" preset.
3. Under Logging output, select "Logging to the Firefox Profiler".
4. Click Start Logging.
5. Reload the page. Then do the steps that show the problem.
6. Click Stop Logging. The profile opens in the Firefox Profiler.
7. Click Upload Local Profile. This is the share button.
8. Copy the share URL. Add it to this bug.

The instruction video shows these steps. If the profile or the media content is private, send it to [e-mail] instead.

Please also paste the contents of about:support into a comment.

Does the stutter still occur when only the two Kick streams play?

Comment 3

[BugBot [:suhaib / :marco]]

Clearing the needinfo request since this bug has been closed as INCOMPLETE for 26 days.

For more information, please visit BugBot documentation.