Komunitné fórum Firefox

Hello! For some time now I suddenly have no sound in Firfox, otherwise the sound works everywhere, even in other browsers. All help instructions do not help. Do I have to switch to another browser for good? Thanks for help

I have noticed that just recently videos across all different websites are not displaying properly. The image part of the video is a green scrambled mess. The audio is fine, but the images are wrong. I am not having this issue on a different browser, and I'm not sure what I'm supposed to do. I don't know if changing any of the settings will help or if there's a bug in one of the updates.

I've recently done a clean reinstall of Windows 11 and have noticed that, only for Firefox (134.0.2, build ID 20250120135430), a few videos playback without any audio, yet the same videos play with audio when using edge as a comparison. Most (if not all) of these videos did play with audio in Firefox prior to this reinstall.

Firstly, I'm pretty sure this is not a windows sound mixer issue since many videos on the same page and tab play back with audio just fine in Firefox. The same goes for it not relating to the Firefox setting 'Speaker selection', under (burger) > settings > privacy & security > Permissions because videos of different formats (or using different players) on the same page play back audio fine. The tab is not muted. Again, some videos on the same browser tab play audio fine; some of a particular format or player only play the video, while missing the audio (and where Edge plays the same video with audio).

Another common and potentially relevant issue I've seen is that, this being a 'Windows 11 N" install, it was initially missing the settings > system > optional features > Media feature pack, but that is now something I've successfully added. I should add that windows did report problems when I initially tried to add the media feature pack but, after a very long delay, it eventually appeared to succeed when I ran a couple of DISM incantations that I think ended with - "dism /online /add-capability /capabilityname:Media.MediaFeaturePack~~~~0.0.1.0"

I have the 'Play DRM-controlled content' setting enabled.

Comparing the Firefox vs Edge video playback on this video test page - https://tools.woolyss.com/html5-audio-video-tester/ I get the following results (don't know how to get it formatted/aligned correctly, sorry) -

                           FF vid    FF audio    Edge vid    Edge audio
av1-opus-sita.webm          Works     Works       Works       Works
vp9-vorbis-spring.webm      Works     Works       Works       Works
vp8-vorbis-sintel.webm      Works     Works       Works       Works
avc-aac-nerdist-friends.mp4 Works     MISSING     Works       Works
avc-aac-big-buck-bunny.m4v  Works     MISSING     Works       Works
avc-mp3-sita.mov            Works     Works       Works       Works

And perhaps also relevant is that there's also a difference in the audio-only samples further down the table on the same page -

                   FF audio   Edge audio
audio-sample.mp3    Works      Works
audio-sample.weba   Works      Works
audio-sample.ogg    Works      Works
audio-sample.opus   Works      Works
audio-sample.flac   Works      Works
audio-sample.wav    Works      Works
audio-sample.m4a    FAILS      Works
ac192.mp3           Works      Works
spoonradio-hd.aac   FAILS      Works
audio.opus          Works      Works

Also, every 'v.redd.it' / reddit-video-player video plays the video fine but has no sound when using Firefox but plays both sound and video fine with Edge. Here's one for example - https://old.reddit.com/r/funny/comments/1i7y1nr/rock_paper_scissors/

I've seen lots of similar (but not identical) issues on Firefox video with no audio problems with suggestions a few things to try. In addition to what I've already mentioned above, I've tried the following without success -

- Restarting Windows - Restarting Firefox - Restarting Firefox with addons/extensions disabled - 'about:support' > Refresh Firefox - 'about:support' > Clear startup cache - (hamburger) > more tools > task manager > (click the little profile icon for the page playing the video) - I've checked the settings suggested here: https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues#w_check-some-firefox-settings

I realise it may be possible to side-step this problem by flailing around with more drastic work-arounds like trying a clean re-install of Windows or a full uninstall and clean of Firefox, but that doesn't really help figure out the problem, which leaves the possibility it could easily happen again to me or others when it might be something that can be more properly fixed or guarded against in Firefox itself, so I hope someone can suggest what might be done to home in on identifying the cause of the problem and so learn whether a more precise fix can be employed.

Hello mozilla support team I am Gina I have this problem for about two or three weeks now.I try to watch videos on mozzila firefox and I get gliches and sound dose'nt work.I don't have those problems on vivaldi at least at this moment. I realy hope you can solve those issues. Kind Regads! Gina Monica Ciuca

We're finding we can no longer watch FUBO TV on Firefox. Works fine in Edge. Anyone have any suggestions? We've cleared cache/history, restarted laptop, etc. This occurs both on recorded programs and live tv. We still seem to be able to get the commercials, although we tried watching on two different devices and the commercials were very different. Is it possible for Firefox to have been hacked but not Edge on the same device? Doesn't sound plausible to me, but I'm not sure. This has happened since the last update to Firefox. We have Windows 10 64 bit. Firefox 134.0.2 or whatever the latest version is. We're stumped why it works on one browser but not the other. Has to be a Firefox issue.

I decided to download Firefox and make it my default browser, so I downloaded it and followed some recommendations I found online for configuring security settings...but for the life of me I can't remember what those are.

Weeks later, I decide to watch Peacock, but the error message says I need to disable my ad blocker. I search for an ad blocker in the extensions but can't find one, so I start disabling other extensions like Facebook Container...but to now avail. I follow all the usual online steps--clearing my cache, restarting the application, restarting my computer, etc--but nothing works. I have the same error with Netflix, and switching to another browser yields the same result. So it must be something wrong with my system.

Can you help?

Whenever I try to watch a video, on any website, it pixelates so bad that it's just unwatchable. Do I have a setting wrong that could fix this? Watching the same video on different browsers (edge, chrome) works fine. I've attached an image to show what I'm getting. Occasionally, it will work just fine but if I pause the video to come back to it, it goes back to this at some point.

I'm running on windows 11 and Firefox Version 134.0.2 (64-bit)

I cannot select 8K60fps Youtube playback on my M4 Mac mini, so please add support for this in the Firefox MacOS browser for Apple Silicon devices, or at least the latest M4 series of chips.

This issue just appeared. Video will not play in Firefox. Windows10 PC, up to date with latest versions, as is Firefox. There is no error message or code. Just the spinning wheel. I see other people are having the same issue but I haven't seen a solution. Any ideas or help appreciated.

I got this new Chromebook, and now I'm having issues using YouTube. When I select a video to watch, a message pops up at the top saying "To play video, you may need to install the required video codecs." I am able to watch the video I selected anyhow, with some minor issues with the picture and its frames I believe, however, when I try to watch a different video, it does not work. Sometimes it will play for a short bit, but will then stop, and start buffering. When I then refresh the page, the video will not play and will only buffer. I am not sure what to do, and if this is an issue with the browser, or the device itself, please help?

I cannot seem to get playback with Firefox browser for either Tubi TV or Pluto TV anymore. Have uninstalled and reinstalled Firefox, have tried to just refresh data yet still no playback.

hi

i need help with a website that used to play videos but since last few times its not working as its saying video cannot be redirect to due to cookies but i clear them so can you help

Audio doesn't work with Firefox. This appears to be ONLY a Firefox problem. Headphones work with Edge. Computer speakers work. In Windows settings, testing audio works. But when I attempt to listen to something in Firefox, there is no sound at all.

Do you know of a mod that won't allow Youtube to have a resolution higher than 720p, including when embedded? I almost-always have Youtube at 480p when watching through their site. I noticed that when watching a video on another site and that it's embedding Youtube, that the resolution is higher > 480p and in those cases it's not rare to be > 720p.

I'd like a mod or setting so that when it's active that Youtube can't have a resolution higher than 720p, including when embedded. Any idea if there's something alike?

Thank you kindly for your help

I have no idea how to access the following directions I found trying to address the question of : How to stop videos from following as you scroll down a link huff post …..Firefox 135. Mac 12.7.6

Go to about:config and set media.autoplay.enabled.user-gestures-needed to false to disable all kinds of autoplay.