I-Firefox Community Forum

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.

Whenever I use Google Meet in the Firefox browser, it works well at first people can hear me. However, for a few seconds, my microphone suddenly cuts out, and I have to raise my voice for it to work again. My microphone remains enabled and does not disconnect when the audio cuts out, but people are still unable to hear me. I have already set my microphone to 'Always Allow' instead of 'Allow Temporarily, but the problem persists.Can anyone help me with this

I'm not sure if this is a Firefox or Google problem, I'm guessing Firefox because it doesn't happen in Chrome.

Every time I try to login to google in Firefox it auto logs me into a specific account, I don't mean it is already logged in, I'm logged out and where the blank field is to enter your account username(email) the drop down pops up and shows all the gmail accounts and picks one on its own then procedes to the next page for the password on its own. It's like someone took control of the mouse and was doing it for me. Really pisses me off because I'm trying to login to a different account and it chooses the same one every time and I can't choose. If this is some kind of auto login feature please tell me how to turn it off.

My Firefox browser has been crashing for a while now (Years). It's fine playing YouTube and BBC iPlayer but when I advance the time marker to a different part of the stream or video, it crashes. It also has a problem when playing slots. It seems to crash a lot making it impossible to play.

I have tried using Firefox in Troubleshooting Mode but the same things happen.

Here's the crash report ID

Report ID Date Submitted bp-a9b8bd6e-9258-4a25-badc-bda480250308 08/03/2025, 13:41

Many thanks in anticipation and I hope someone can help me fix these issues.

Lost my audio on Firefox. All movies and web site videos SILENT

Strange exceptions: e.g., can't ear video on youtube.com; BUT, CAN hear it if web page has LINK to YouTube!?!? SOME Twitter videous have audio; others are silent

How do I turn Firefox audio back ON?

Trying to run Prime and Netflix in a Linux browser on my new Lenovo Chromebook Plus 14. Not that this is an ARM based unit (Kompanio Ultra 910).

I can successfully download Firefox for Linux: Mozilla Firefox Debian Package mozilla-deb-1.0 144.0 (aarch64)

But when I go to run streaming video services get: Prime Video is incompatible with your current operating system or web browser. You must update to watch Prime Video titles. Review the Prime Video system requirements. If the problem continues, please contact Amazon Customer Service and refer to error 7132.

Same with Netflix.

any ideas, thoughts, solutions?  :)

Cheers.

Hello,

NVIDIA RTX Video Enhancements are not working in firefox at all. By not working, i mean neither Super Resolution neither HDR enhancements work at all, not even the badge shows up, and the NVIDIA app reports the status as "inactive". The video is not upscaled, and the content isn't getting put into HDR. It is on globally on my system, and does work on all the chromium based browsers installed on my system, even on the discord app itself.

I tried a latest firefox fresh install, with youtube playback, or just opening a video file directly with the browser. This worked on chromium browsers, but not on firefox.

I'm on windows 10 64bit with a 3060 gpu. (the only gpu in the system.) I have 4 monitors connected, but still get the same issue with only one. Hardware decoding is force enabled, and about:support reports that hardware decoding is supported for H264, VP8, VP9 and AV1 too. I even get the same amount of video-decode usage in task manager on both chromium and firefox while video is playing.

Thanks in advance.

I was able to stream news from CTV news site but for some unknown reason I cannot stream it like I used too I cannot figure out why! Something must be wrong with my setup. Please help me fix my problem.

This problem started yesterday. The sound in YouTube with Firefox is extremely low. As far as I can tell, the problem doesn't exist elsewhere. Other browers are OK with YouTube and other websites that have sound are OK with Firefox.

I reinstalled Firefox and rebooted the computer - still has the problem.

I'm using Windows 11 24H2 (home) on my desktop.

I've seen many questions about this matter over the years, and thought I'd been lucky. Every link containing a .m3u file opened in my media player, WACUP. However ... after an update to version 143 it suddenly didn't. .m3u links opened as a text file in the browser window.

We have five windows 10 workstations in the home, and this happened with all of them.

I write webpages for a family intranet, and several thousand tracks are available for playing, so that was messed up too.

These are the steps I followed - unsuccessfully:

• Bulleted list item Checked file association settings in Windows 10. .m3u was associated to WACUP, my media player.
• Bulleted list item Checked file actions in Firefox. .m3u files set to open in WACUP.
• Bulleted list item Added the type="audio/mpgurl" in the anchor link for webpages I make.
• Bulleted list item Changed the default download panel in FF settings to "Ask". I could then get it to ask me to save or open. "Open" worked, as it this is tied to the system default audio player - nothing to do with FF.
• Bulleted list item A few other frustrating, but eventually inconsequential solutions that were in the realm of "I wonder if ...?"

So ... after all of this and a lot of investigation I noticed something interesting: All my playlists were in the format with just a listing of the filename, which as mentioned had been working for years:

Example "01 Queen - We Are The Champions.mp3".

Yet a playlist made in VLC had a different format: example,

"#EXTM3U

1. EXTINF:-1,01 The Beach Boys - Help Me Rhonda.mp3

01 The Beach Boys - Help Me Rhonda.mp3 "

SOLUTION

Having far too much time on my hands, I experimented with this, dissecting the various components of the playlist, and eventually found when adding "#EXTM3U" as the first line in the playlist, Firefox opened the playlist in WACUP once again when the link was clicked.

New playlist entry:

1. EXTM3U

01 Queen - We Are The Champions.mp3 02 ... 03 ... etc.

I've left the "type='audio/mpegurl" declaration in the link.

I don't know why this happened, but I hope somebody finds this useful in the future.

So now I have several thousand playlists to edit, although Notepad++ will make this easier, but by no means quick.

Здравствуйте. Последнее время заметил следующую проблему. При открытии некоторых сайтов, где есть видео или транляции, колесиком мышки открываю нужные видео или трансляции в новых вкладках. Ситуация следующая. Если не спеша открыть несколько вкладок, например 5, после перейти к ним, то нужно нажать в центре видео/трансляции "плей", чтобы видео стало работать. НО, если открыть вкладки (так же 5 или более) и сразу же переключаться на них, то видео будет автоматически стартовать. Раньше так и было при добавлении нескольких вкладок с видео, а после переключения на них, видео сразу открывалось. Теперь - нет. В настройках ничего нигде не менял, проверял как на версии браузера для пк на 133..., так и на последней 137... Отключал все дополнения, в настройках сайтов давал разрешение для автовоспроизведения аудио и видео. Хочу отметить, что такая проблема на многих сайтах. На некоторых же всё работает как и раньше. Также отмечу, что переустанавливал браузер с полной очисткой. Железо у пк хорошее, озу 32 гб. Никогда проблем такого рода не было. Прошу помочь с решением проблемы.

Hello, I'm having a problem on Windows 10. It's a fresh windows installation and I tried already some solutions: reinstalling firefox, deleting cache, refreshing firefox, private windows, no add ons, trouble shoot mod. Nothing helped. The problem seems to be with live stream, either on twitch.tv or youtube.

As the title says. I get this prompt on videos from different, yet particular websites and sources. And they fail to load. It's also happened where some video's work and some don't, side-by-side on the same website and session.

• I've tried clearing all of my cached data, my browser history, cookies, site-data, settings, and fill-out information. No avail.
• I've tried disabling all of my extensions and add-ons.
• I've even tried using google instead, but I just get constant loading on those particular video's with no thumbnail (As depicted in second picture).
• I've checked my video drivers for updates.
• I've tried reinstalling Adobe Flash Player, even though it says it's no longer supported.

Since it also might be happening in another browser. I understand how this might not be Firefox's fault. But I'm hoping you'll be able to help me still.

My account on thinkific is cookingasmedicine.thinkific.com When I go to the "course" and click on a video whether in my class or one I am taking, the videos will NOT play. I have been talking with Thinkific and we've gone through all the videos of yours and theirs - the settings, checked my updates and nothing works. I have no trouble on my laptop or my Iphone using firefox on laptop just on my desktop LENOVO.

I checked my set up that is on the laptop and made it exactly the same on my desktop but STILL to no avail. The videos will simply NOT play!

Would you please help me?

I have Windows 10 and currently have auto updates so I am up to date with your updates. I just can't imagine what it could be that's stopping the videos from playing? They played perfectly for three years! I have not put any new apps or programs on my computer either.

Thank you, Claire

Since the latest update to my Firefox, videos (for example, in documents such as surveys) either do not load or they freeze. And in some streaming applications, either they play with no sound or when sound is turned on the video freezes. This was never a problem until recently. iMac desktop (2017) Ventura 13.7.4 Firefox 136.0.2 (64 bit) The same issue does not occur on Safari or on my iPad (using Firefox). Any advice?? Thanks.

Only on firefox, the music on apple music keeps changing volume. I can hear it sound fine for a second but then it changes the volume to around half of what its meant to be. I dont see any settings to change it, its fine on other browsers, im genuinely unsure of what to do.

I can select the video on the thumbnail and then the thumbnail says playing but nothing is happening. No video and no audio. Videos on all other sites work normally

YouTube videos encoded at 60 frames per second are extremely choppy in Firefox only. Microsoft Edge plays the same videos perfectly.

I have deleted my profile and reinstalled Firefox, updated graphics driver to the latest version, and toggled hardware acceleration on and off. Nothing helps.