I-Firefox Community Forum

Issue Description: I’m experiencing a problem with fullscreen mode while using YouTube on Firefox on Windows 11 with a dual-monitor setup. When I enter fullscreen, the video does not cover the entire screen. Instead, I can still see parts of the Windows desktop or background around the edges of the display.

This issue only happens on Firefox and only when using fullscreen mode on one of my monitors. I have already checked my display settings, scaling, alignment, and hardware acceleration, but the problem persists.

System Details:

Windows 11

Dual-monitor setup

Browser: Firefox (latest version)

Issue: Fullscreen video shows borders and does not fully cover the screen

Expected Behavior: The fullscreen video should completely fill the selected monitor without showing any part of the Windows desktop.

Please advise on how to resolve this issue.

I've been having an odd issue with my cursor for a few weeks, even after updating to the currently most recent version (146.0.1) running on MacOS Sonoma. After I play a video, on YouTube or a streaming service like HBOMax, the video information bar at the bottom of the screen disappears. Previously, the cursor would disappear with it. Now it doesn't. Once the video bar disappears, I have to move the non-disappeared cursor once again, which brings back the video bar, and the cursor then disappears with the video bar on the second effort.

It's a minor issue, but is quite annoying, particularly considering this did not used to be the case over the last 10+ years of my Firefox usage. I'm hoping someone has fix, and if not, dev team can take note of this to be addressed in future versions.

I am do not get sound using audio recorded with akamai player with Fire Fox browser. I tried the same link using Edge browser and the audio works.

I have tried clearing the cache, but still no sound.

How do I resolve this issue using Fire Fox as my default browser? Is there an audio extension that is needed?

i have no sound in firefox ,while other applications and edge or chrome give me normal sound.It ia no muted ,checked the volume mixer everything should be working but no sound

I have two audio outputs I'm trying to use. I want my main output (device A) to stay as the default, but have Firefox play out of the other (device B). There is no option within the browser's settings to change the output device, so I am controlling them through Windows' Volume Mixer. If I set device B as the system default, it works, and it allows me to change Firefox to play from any output. However, if anything else is set as the system default and I set Firefox to play from device B, it doesn't work. It seems like it ignores only specifically that one device, and only when it is set at an app-specific level. It works on all my other outputs no matter which is the default. Even if I have device B as the system default, then at the app-specific level, set FF to any other device, then select device B, it ignores this and continues to play out of whatever device it played from last. The ONLY way I can get Firefox to play audio from device B is with device B as the system default. It's already disappointing that I can't control this directly from FF settings, but the fact that it's also ignoring my OS settings is really frustrating. I've already contacted Windows support, and they say the problem is with Firefox since all my audio devices are working fine. If anyone can tell me a way to just manage this setting properly in Firefox, some way to get Firefox to recognize the device, or some way to allow my windows settings to take priority over whatever FF is trying to do, that would be greatly appreciated. Thanks.

I am running MacOSX 11.6.8 and have just recently had my Firefox browser update to version 146.0 and it now has a problem with content playback: whether on video or usic, YouTube or Tidal or any other streaming service, whenever playing back content it stops at 2 minutes and 8 seconds, displays the buffering wheel, and doesnt come back on its own. If I hit pause and then hit play again, it starts playing again fine. But then after 2 minutes and 8 seconds it stops again and I have to restart it again. And again. And again every 2 minutes and 8 seconds. This is a very odd problem, is anyone else experiencing this? It is very annoying.

Some videos work perfectly fine, however for some videos audio lags behind the video. The same video file perfectly works in Chromium as a control test. Example file is MP4, inside was initially h264 video with AAC audio, for test I re-encoded video to be svt-AV1 with AAC / flac as well - no difference, audio still lags behind. Local players (mpv) and Chromium works perfectly. No plugins which can affect it - for testing disabled them all. I really try hard to like Firefox but this thing is a real bummer. Any ideas what can be causing? P.S. I tested both firefox compiled from source and binary package provided by my distro. Linux system if that matters.