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.

Respected one, since 2 days ago, the sound was lost when playing video content on platform X. I did not make any changes in the settings for M.F. not even in PC, I HAVEN'T CHANGED ANYTHING FOR MONTHS. Do you have any ideas, advice... Thank You for taking the time to solve my problem.

For a few weeks now, the bluetooth sound drops out or will not connect, the screen freezes and says Firefox is not responding, the screen buffers for a while. V annoying and only when connecting bluetooth sound. Have tried with two different brand speakers, same thing happens. The bluetooth keyboard does not drop out at all, ever. Image is while listening to a TV series on Hulu~

When I play a downloaded video that is in English, my downloaded file plays back in a foreign language, not English. What am I doing to cause this and how can I have the English version only in playback everytime? Thank you so much, being a pensioner I am eager awaiting the ability to donate to you excellent work as often as I like.

Hi Team

I am facing 2 issue as below.

1. The issue the when I play the video on 2x in YouTube then video and audio both stats lagging.

2. When I am watching any video on YouTube in firefox and minimise it and again open the browser then is open in landscape mode although my auto rotating in off.

There are these 2 bugs which i have found.

Rest are Awesome you are doing great work.

Thank.

Jasvir

i bought a GMKtec K12 Mini PC AMD Ryzen7 H 255 (Upgraded 8745HS) Oculink Support DDR5 and youtube videos at 4k 60 hz stutter big time when i log in to my youtube acount.i am a premium user.all driver are up to date.my intel laptops using firefox browser work perfect no frame drop whatsoever.i have bought 2 of this mini pc and bouth behaving same on firefox(i tried on all firefox browsers: F.NIGHTLY,FOR DEVELOPERS,ESR) I also have an laptop with AMD cpu and behave same: stutters on 4k 60hz. Recently i tried FLORP browser and youtube 4k 60hz works perfect until i log in to my youtube acount and then it starts stuttering and loosing frames big time so bad i even cannot watch the video.ive tried on trubleshoot mode ,started from scrtach with same results

Since my Firefox updated, the audio system is not work that I miss most virtual meetings. I tried multiple times but I cannot update to play the audio system. Please help the steps to set up my computer system. Thank you. Jong Lee

Hello, So I have chosen Firefox as my default for 10 years now over the others. Lately every time you guys update I can't play videos from Starz and Paramount. First one update ruined Starz and now this past update ruined Paramount. YouTube plays fine and Netflix play fine.. Network TV stations play fine (CBS, NBC, Fox, & ABC). Now no matter what I do as far as setting I can't get videos to play on those 2 Platform

I'm on Ubuntu (LTS) FF 145.0.2

The audio plays fine, but the video (youtube) freezes like every 40s or so. Playing videos in MPV or Brave is flawless. I dont see extra ordinary CPU activity or anything obvious.

Ideas why this could be?