Diễn đàn hỗ trợ Firefox

I have a Windows 11 PC with Creative Sound Blaster Z sound card. The sound card and Windows settings are configured for 5.1 speakers and both test OK for sending sound to all 5.1 speakers correctly. Additionally, I can go to https://www2.iis.fraunhofer.de/AAC/multichannel.html using Chrome or Edge browsers and all the tests play correctly to all of my 5.1 speakers. However when I go to this same site (or any other with 5.1 audio) using Firefox browser, the 5.1 audio only plays in stereo (no audio to center or rear speakers - everything is down-mixed to the front L/R speakers only). I've double-checked that the Mozilla channel in Windows Volume Mixer is configured correctly (for output to the Creative Sound Blaster Z device), and none of the output audio enhancement modes are enabled in the Sound Blaster control panel. Firefox is version 136.0.4. Bottom Line: only Firefox seems to be having trouble playing 5.1 audio correctly. Any ideas what might be wrong or any settings adjustments to try?

Dear All and Mozilla Developer Team,

Since the recent updates of the Firefox the Browser Performance has become completely unsuable on Windows11 running machines. Now after tracking the browser behavior I can assure that it is the Browser and not only the entire firefox crashes daily and hourly, but also the performance has downgraded dramatically.

There is also issue with the audio and video playback, which does not come back when the video and audio playback and popups are being blcoked and then unblocked.

What I dont understand is, why the update is being pushed into püroduction when and causing millions of users to not be able to work !!!! This is completely unacceptable. Is there any test done beforehand? Who has decided that this updates must be added to MozillaQ!!!!!

how to get back to the working browser? thanks in advance for information

I have sound when I watch Youtube videos using Google Chrome, but they do not work when I use Mozilla Firefox. The sound used to work on Youtube videos using Mozilla Firefox, but now they don't work. I don't understand what happened. And I don't know how to fix the problem. I've tried re-installing Mozilla Firefox and unchecking my hardware acceleration in the settings, but still no audio on Youtube videos. Please help!

Videos over a certain resolution won't play on Twitter/X. Anything 1080 and over vertical won't play. I get audio, but not video. If I use Maxthon (Chrome) I can see the video. I've downloaded the video files and those that are 1080 vertical are the ones that won't play in Firefox. In the picture I'm sending, you can see that Firefox is stuck on the very beginning of the video and the Maxthon video has started, hence the subtitles. Is there a setting in Firefox that will allow me to watch these videos? Thank you.

Hi,

I've been trying to solve this issue for the past several months with no avail. I tried configuring some settings via about:config with:

gfx.webrender.compositor - false widget.windows.window_occlusion_tracking.enabled - false

I also unchecked both "Use hardware acceleration when available" and the "use recommended performance setting".

Essentially, I want to be able to watch movies/videos on sites like Netflix and Hulu. Right now only a black screen shows with the audio playing or the screen is frozen in one scene and the audio continues playing.

Does anyone know what else I can do to solve this problem?

Recently switched from Chrome to FF on macOS. Running latest Sequoia 15.3.2, Firefox 136.0.2 (aarch64) on a Macbook Air M4.

Problem: When watching a video eg YouTube but including other HTML video, on Firefox where macOS is globally muted and scrubbing through the timeline using the arrow keys, or starting a video mid-way, the audio briefly cuts in (less than a second) and quickly mutes again. I was surprised by this as I expected with macOS globally muted, no application would be able to make any sound.

This behaviour is limited to Firefox and persists with all extensions disabled. macOS is stock with Sound output set to the built-in Macbook Air speakers. No other sound drivers e.g. Soundsource or a USB audio interface have been installed. The laptop itself is brand new and stock.

Can anyone explain why this might be happening?

I've recently switched back to Mozilla Firefox again & I installed it via its official installer in Windows 11.

There's something wrong with playback what I noticed is that if I disconnect my wired earphones/headphones & then it pauses the media playback.

I am not aware that if this is an issue, bug or default behavior.

If it is not an issue then is there any possible way to modify such behavior.

Note:

• This thing is tested when all extensions are turned off (disabled)
• Such behavior is observed in both web players such as YouTube, dailymotion, etc. & locally stored/saved/downloaded videos played in Mozilla firefox.
• Not any setting was imported from any browser

I don't know when it began but on 136.0.3, I'm experiencing choppy playback of 4k/24fps video. 60fps works fine, as do lower resolutions of 24fps content. I confirmed that YT is using the VP09 for playback.

No matter what site I am using, youtube, or any other site that contains videos or audios, I cannot hear the sound when using Mozilla. I want to mention that there is no problem with my speakers because if I use Chrome on the same computer, the sound works. Can you help me?