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Firefox having problems with streams: This video is either unavailable or not supported in this browser. (Error #4000)

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,… (ďalšie informácie)

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.

Solved Archivované 3 1542

Hello, I’m using Mozilla Firefox on Windows 10. The issue happens mainly on YouTube: – Videos stutter every few seconds – Audio sometimes goes out of sync – This happens on 1080p and 720p – My internet speed is stable (~XX Mbps)

Hello, I’m using Mozilla Firefox on Windows 10. The issue happens mainly on YouTube: – Videos stutter every few seconds – Audio sometimes goes out of sync – This happens … (ďalšie informácie)

Hello, I’m using Mozilla Firefox on Windows 10.

The issue happens mainly on YouTube: – Videos stutter every few seconds – Audio sometimes goes out of sync – This happens on 1080p and 720p – My internet speed is stable (~XX Mbps)

Solved 1 705

playback of DRM content

no matter what I try I cannot get any content from HBO max, crunchyroll, or spotify to play. I feel as though I have tried every troublshooting step. In firefox 140.0.4 6… (ďalšie informácie)

no matter what I try I cannot get any content from HBO max, crunchyroll, or spotify to play. I feel as though I have tried every troublshooting step. In firefox 140.0.4 64 bit on windows 10 I have:

-turned DRM off and on -disabled and re-enabled widevine -disabling all extensions -try in a private tab -turning off tracking protection -clearing cookies/cache/site data -uninstalling and reinstalling firefox -trying on firefox nightly -trying on other firefox based browsers zen, librefox same issue. chromium based browsers and firefox on my windows 11 laptop play drm content like normal -manually installing older version of widevine -changing useragent to chrome(this triggered cloudflare and would not let me pass) -making another user in windows and trying there

the error i get on crunchyroll is code: DRM-0 and on spotify it loads but the play icon does nothing. in hbo max i get error code 1k-0003

At this point I don't know what else to try, If there is not another solution I probably try to just switch to brave browser or wiping this pc and reinstalling windows.

Solved Archivované 1 488

Video Playback on YouTube Is Consistently Choppy and Lagging

I need assistance resolving an issue where videos on YouTube play choppily in Firefox. The playback stutters frequently, even at lower resolutions, while other browsers s… (ďalšie informácie)

I need assistance resolving an issue where videos on YouTube play choppily in Firefox. The playback stutters frequently, even at lower resolutions, while other browsers stream smoothly. I’d appreciate guidance on troubleshooting steps to improve video performance—such as checking hardware acceleration, browser settings, or possible extensions causing the issue.

Archivované 1 413

Firefox crashing when using BBC iPlayer, YouTube and Slots

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 stre… (ďalšie informácie)

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.

Archivované 4 363

Lost my audio on Firefox

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 YouTub… (ďalšie informácie)

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?

Solved Archivované 4 353

How to fix audio not playing via HDMI

Whenever I play something in the browser while connected to my TV by HDMI, the sound still comes out of the laptop speakers. This happened suddenly, without any discernib… (ďalšie informácie)

Whenever I play something in the browser while connected to my TV by HDMI, the sound still comes out of the laptop speakers. This happened suddenly, without any discernible reason, and I can't seem to fix it. Everything else works, only content played from Firefox remains in the laptop speakers. I've checked my audio mixer, nothing seems amiss, I've updated Firefox and refreshed the application, still nothing. Hell, I've even tried different cables and HDMI ports, but nothing works. What could be the issue? Why did my audio suddenly stop working, and what can I do about it?

Solved Archivované 1 335

Firefox exits full screen when autoplay is enabled on a streaming website.

Reposting until I get help from someone. Windows/desktop. On Google Chrome, any streaming website I used with autoplay enabled would KEEP full screen mode ON after changi… (ďalšie informácie)

Reposting until I get help from someone. Windows/desktop. On Google Chrome, any streaming website I used with autoplay enabled would KEEP full screen mode ON after changing episodes. It would automatically go to a new page with the following episode and remain full screen. Why doesn't Firefox have this feature?? I'm seriously considering going back to Google Chrome for this one small feature. Every time I had any streaming service playing with autoplay enabled, I didn't have to manually select the full screen option every time. I am having to stand up and manually click full screen function. Every. Single. Time. Somebody please help me if there's a way to active that function.

Archivované 8 321

Sound does not play any more on Rumble.

Sound on Rumble. It has always had an Enable Button with a bell, and clicking on that button has always enabled the sound at the videos I watch on Rumble. Recently, cli… (ďalšie informácie)

Sound on Rumble. It has always had an Enable Button with a bell, and clicking on that button has always enabled the sound at the videos I watch on Rumble. Recently, clicking on the button, adjusting the sound on Rumble settings in the video, and boosting the sound on my computer do not work. I'm hoping that can be fixed. Thanks in advance.

Archivované 1 315

audio is not playing in firefox

audio is not playing in firefox, nor does it appear in my third party sound mixer like it usually does. it does appear in windows' sound mixer, but does not play any audi… (ďalšie informácie)

audio is not playing in firefox, nor does it appear in my third party sound mixer like it usually does. it does appear in windows' sound mixer, but does not play any audio. i have refreshed firefox and checked my drivers and my devices work fine. firefox is the only application on my computer that refuses to play audio.

Archivované 1 304

Media not supported

Hi, How can I force Nightly to play a media type ? Per instance, the top main video here : https://www.lapresse.ca/international/asie-et-oceanie/2025-12-23/coree-du-nord/… (ďalšie informácie)

Hi,

How can I force Nightly to play a media type ? Per instance, the top main video here : https://www.lapresse.ca/international/asie-et-oceanie/2025-12-23/coree-du-nord/kim-jong-un-inaugure-un-complexe-hotelier-dans-une-station-de-montagne.php

Best regards iBenny

Solved Archivované 10 294

Streaming skipping back 1-2s every now and then

I've recently decided to return to FF. On the whole everything is going fine, except for streaming. I often use my provider's site (nostv.pt) to watch some games, races o… (ďalšie informácie)

I've recently decided to return to FF. On the whole everything is going fine, except for streaming. I often use my provider's site (nostv.pt) to watch some games, races or shows. However, every time I do, I'll get backwards skips every now and then where the stream goes back 1-2s. Usually the second time this happens the stream detects I'm no longer live and I can skip ahead to real time, but this is annoying, especially when watching games. During a 2h stream session this will happen around a dozen times.

So I would like to know if there are other people with the same issue or what I can do to prevent this from happening.

Archivované 1 286

Streaming my radio station.

I am feeding my radio station into my computer, but when i bring the station up on a computer is is a page with my station on it and click on the play button it plays you… (ďalšie informácie)

I am feeding my radio station into my computer, but when i bring the station up on a computer is is a page with my station on it and click on the play button it plays your music instead of my station. How do i fix that?

Archivované 1 286

"No Video with Supported Format and MIME Type Found" On

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 … (ďalšie informácie)

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.

Archivované 3 285

Firefox video player

I get a "Sorry, the video player failed to load.(Error Code: 104153)" error when clicking links from a search for a video, if that video is available on YouTube it opens … (ďalšie informácie)

I get a "Sorry, the video player failed to load.(Error Code: 104153)" error when clicking links from a search for a video, if that video is available on YouTube it opens and plays just fine, not from other websites though - and it should. Fix?

Archivované 9 274

microphone issue on google meet

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 r… (ďalšie informácie)

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

Archivované 4 246