Showing questions tagged:

Videos lag on YouTube after latest Firefox update.

This is where you describe the issue in detail. Explain what’s happening (e.g., “Videos keep freezing after 10 seconds”). Mention when it started and what you already tri… (read more)

This is where you describe the issue in detail.

Explain what’s happening (e.g., “Videos keep freezing after 10 seconds”).

Mention when it started and what you already tried.

Include your Firefox version (you can find it under Menu → Help → About Firefox).

Open 1 1 70

Lost Sound

When I am watching a YouTube video and switch tabs, sometimes, on return to the YouTube tab, I have no sound. It is not muted. The system sound is fine. This does not al… (read more)

When I am watching a YouTube video and switch tabs, sometimes, on return to the YouTube tab, I have no sound. It is not muted. The system sound is fine. This does not always happen. I can switch tabs and still hear the sound. Then switch back and no sound. The video is not paused. I've tried pausing and playing the video, still no sound. Refreshing the tab doesn't help Where do I go to turn the sound back on? Win11, Firefox v144.02 64 bit.

Open 1 1 173

playback speed youtube not working

Hello Mozilla Support Team, from yesterday playback speed on youtube is not working. When I open the same video with Edge playback speed is available. Could you please c… (read more)

Hello Mozilla Support Team,

from yesterday playback speed on youtube is not working. When I open the same video with Edge playback speed is available.

Could you please check and rework?

Thanks in advance.

Many greetings Stefan

Open 1 1 139

How to adjust the HLS setting.

"Oops, your browser's HLS setting is too low." Trying to stream, in browser, and I'm completely blocked today. The browser says it's fully updated. And yet. Whatever… (read more)

"Oops, your browser's HLS setting is too low." Trying to stream, in browser, and I'm completely blocked today. The browser says it's fully updated. And yet.

Whatever the case, where and how do I check and/or adjust the HLS setting?

Open 1 1 118

AV1 Hardware Acceleration stopped working

AV1 Hardware Acceleration stopped working. In about:support->Media->Codec Support Information Firefox states that Harware Decode AV1 is supported but it uses only S… (read more)

AV1 Hardware Acceleration stopped working. In about:support->Media->Codec Support Information Firefox states that Harware Decode AV1 is supported but it uses only Software Decoding. AV1 worked perfeclty before in Firefox, is still working in other browsers and apps in my system.

System Specs: Ubuntu 24.04 LTS 6.17.0-19-generic Asrock Intel Arc A380 Firefox 149.0 (64-bit)

export LIBVA_DRIVER_NAME=iHD export LIBVA_DRM_DEVICE=/dev/dri/renderD129 export MOZ_DRM_DEVICE=/dev/dri/renderD129

vainfo libva info: VA-API version 1.20.0 libva info: User environment variable requested driver 'iHD' libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so libva info: Found init function __vaDriverInit_1_20 libva info: va_openDriver() returns 0 vainfo: VA-API version: 1.20 (libva 2.12.0) vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 24.1.0 () vainfo: Supported profile and entrypoints

     VAProfileNone                   :	VAEntrypointVideoProc
     VAProfileNone                   :	VAEntrypointStats
     VAProfileMPEG2Simple            :	VAEntrypointVLD
     VAProfileMPEG2Main              :	VAEntrypointVLD
     VAProfileH264Main               :	VAEntrypointVLD
     VAProfileH264Main               :	VAEntrypointEncSliceLP
     VAProfileH264High               :	VAEntrypointVLD
     VAProfileH264High               :	VAEntrypointEncSliceLP
     VAProfileJPEGBaseline           :	VAEntrypointVLD
     VAProfileJPEGBaseline           :	VAEntrypointEncPicture
     VAProfileH264ConstrainedBaseline:	VAEntrypointVLD
     VAProfileH264ConstrainedBaseline:	VAEntrypointEncSliceLP
     VAProfileHEVCMain               :	VAEntrypointVLD
     VAProfileHEVCMain               :	VAEntrypointEncSliceLP
     VAProfileHEVCMain10             :	VAEntrypointVLD
     VAProfileHEVCMain10             :	VAEntrypointEncSliceLP
     VAProfileVP9Profile0            :	VAEntrypointVLD
     VAProfileVP9Profile0            :	VAEntrypointEncSliceLP
     VAProfileVP9Profile1            :	VAEntrypointVLD
     VAProfileVP9Profile1            :	VAEntrypointEncSliceLP
     VAProfileVP9Profile2            :	VAEntrypointVLD
     VAProfileVP9Profile2            :	VAEntrypointEncSliceLP
     VAProfileVP9Profile3            :	VAEntrypointVLD
     VAProfileVP9Profile3            :	VAEntrypointEncSliceLP
     VAProfileHEVCMain12             :	VAEntrypointVLD
     VAProfileHEVCMain422_10         :	VAEntrypointVLD
     VAProfileHEVCMain422_10         :	VAEntrypointEncSliceLP
     VAProfileHEVCMain422_12         :	VAEntrypointVLD
     VAProfileHEVCMain444            :	VAEntrypointVLD
     VAProfileHEVCMain444            :	VAEntrypointEncSliceLP
     VAProfileHEVCMain444_10         :	VAEntrypointVLD
     VAProfileHEVCMain444_10         :	VAEntrypointEncSliceLP
     VAProfileHEVCMain444_12         :	VAEntrypointVLD
     VAProfileHEVCSccMain            :	VAEntrypointVLD
     VAProfileHEVCSccMain            :	VAEntrypointEncSliceLP
     VAProfileHEVCSccMain10          :	VAEntrypointVLD
     VAProfileHEVCSccMain10          :	VAEntrypointEncSliceLP
     VAProfileHEVCSccMain444         :	VAEntrypointVLD
     VAProfileHEVCSccMain444         :	VAEntrypointEncSliceLP
     VAProfileAV1Profile0            :	VAEntrypointVLD
     VAProfileAV1Profile0            :	VAEntrypointEncSliceLP
     VAProfileHEVCSccMain444_10      :	VAEntrypointVLD
     VAProfileHEVCSccMain444_10      :	VAEntrypointEncSliceLP
Open 1 1 22

No audio

No matter what settings I change, I still can't get audio to play from Firefox. I can use other browsers and get audio so I know it’s not my computer. I’ve even tried to … (read more)

No matter what settings I change, I still can't get audio to play from Firefox. I can use other browsers and get audio so I know it’s not my computer. I’ve even tried to uninstall firefox and install the newest version with no luck on getting my audio issue resolved. If anyone has any advice for me, it’d be greatly appreciated

المُؤرشفة 1 47

Chromebook Plus - Lenovo 14 2025 (ARM64) - Streaming video services issue

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 downl… (read more)

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.

Open 4 232

Flatpak - No embedded Media/Video Playback

Since Flathub list the org.mozilla.firefox app as official, i hope this is the correct support channel. Recently i switched from distro specific package managers to flatp… (read more)

Since Flathub list the org.mozilla.firefox app as official, i hope this is the correct support channel.

Recently i switched from distro specific package managers to flatpak as my application provider. The firefox flatpak won't play most embedded Video/Media on applications like in-browser fediverse clients, forums, blogs or wikis. Youtube works without any issues, Twitch is fine until there is an adbreak. Then it sometimes stops with the supported format/mime error (screenshot appended), only recoverable by cache-dismissive reload.

I used this Article https://support.mozilla.org/en-US/kb/audio-and-video-firefox and the links it contains to debug without any success. None of these samples play. just shows supported format/mime error https://test-videos.co.uk/bigbuckbunny/mp4-h265 At this test website 1. and 3. example won't play. I provided a screenshot before and after trying to click play on all the examples. https://www.tekeye.uk/html/html5-video-test-page

Contrary to the observed behavior about:support#media claims Software Decoding supported for everything except HEVC.

Chromium Flatpak has no such issues. So i copy the video url and play it with chromium. You can see: dire times.

المُؤرشفة 7 259

Can't get playback with Firefox browser for either Tubi TV or Pluto TV anymore?

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 s… (read more)

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.

المُؤرشفة 1 51

instagram videos not playing

For a couple of days now Instagram linked videos won't play here. Actually some of them will -- my own reels and anything linked with that button that looks like a movie… (read more)

For a couple of days now Instagram linked videos won't play here. Actually some of them will -- my own reels and anything linked with that button that looks like a movie 'clapper'. But videos that show the triangular arrow pointing to the right, nothing happens when you click. Not sure if this is a FF issue or maybe something changed at Instagram. Did a google search and nothing came up.

المُؤرشفة 5 329

no sound coming from any website like netflix or youtube or prime from mozilla browser

Good evening Mozilla, Well I am facing an issue, no sound coming from any website like netflix or youtube or prime from mozilla browser. Could you please fix it for me. R… (read more)

Good evening Mozilla,

Well I am facing an issue, no sound coming from any website like netflix or youtube or prime from mozilla browser.

Could you please fix it for me.

Regards

حُلّت المُؤرشفة 1 93