Firefox Community Forum

If I go fullscreen in any mediaplayer (such as YouTube, Crunchyroll, Prime Video or Jellyfin) I get a bar at the top and a bar in the left. You can see either the wallpaper or another programm, its like shifted to the right and bottom. I know its a problem with tunred off Hardwareacceleration. If I turn it back on the problem never occurs. I tried with troubleshoot mode enabled but there I couldnt recreate it because the problem does not occur, even after I turn troubleshoot mode off. The problem only occurs again after a complete restart of the computer.

I know there are other posts with the same problem but there was never a solution.

I have the problem that if a stream is playing (Youtube or other video sites) and iam on another tab that the stream stopps/hangs for a second...

It seems to hang also if iam scrolling on another site while the video is playin in a not active tab.

If iam on the active tab where the video is playing it is working fine and no stopps/hanging.

So there seems to be a problem with playing streams/Videos on non active tabs...

I testet Linux Bazzite and there wasnt this problem with Firefox.

So seems to be a problem with Firefox in Windows...

I have a computer with Windows 10 and I connect it to a Samsung TV with an HDMI cable. The image plays correctly, the speakers seem to be Samsung's, but while the Windows sounds are heard correctly on the TV, the sounds from the web environment, e.g. Youtube, are only heard on the computer. What settings can I make in Firefox to solve the problem?

Hi, I am using Firefox Developer Edition though I have had this problem with Firefox in the past. The problem is that sometimes the audio from Firefox just stops working, everything else in Windows works but not firefox, I tried having the same youtube video on Firefox and Chrome annd it worked on Chrome. There are times that a Windows restart fixes it and there are times that I just have to wait a couple of days till it fixes itself. The only thing I could find to trigger this behavior is to have mi Bluetooth earphones connected, then disconnect them and sometimes when reconnecting them the audio is just gone. This usually happens when I am working, when I start the day I put them on and start some music on Youtube, after 3-4 hours I do a 15 minutes break and during that time I charge the earphones, when I come back and turn them on again, most of the times the audio is gone. Is this a known issue or something? I can send anything if you want. Thank you

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).

As of Nov. 12th, 2025 (Firefox Version 145.0 (64-bit)) entering full screen for a video reveals desktop/other program windows.

Tested with different websites, YouTube, Amazon Prime Video and Hulu. Issue is consistent across.

In the images provided there are two sets, one full screen the other not. Set desktop background to bright green to highlight issue.

If it matters, using dual monitor setup (BenQ Mobiuz EX2510) both are 1080p 144hz side and issue occurs on both monitors.

Have already tested basic troubleshooting issues such as restarting Firefox and computer.

Thank you.