Firefox Community Forum

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.

This video file cannot be played.(Error Code: 102630)

I’m getting this error for some reason, and I can’t figure it out. I’ve tried downloading various support files for different codecs, yet I still can’t play videos on websites or live videos like YouTube livestreams.

I’ve tried reinstalling the browser, VLC, and updating the media drivers, but it still doesn’t help. The same videos run fine in other browsers like Edge, but for some reason, they won’t play in Firefox.

Speech output for Albanian on the website "loecsen.com" > language course "Albanian". Words cannot be heard under Windows 11. What can I do? I downloaded the Albanian language pack, but the voice isn't there. Is this a Firefox or Windows problem?

Link: https://www.loecsen.com/de/lernen-albanisch

Greetings from Switzerland