Diễn đàn hỗ trợ Firefox

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.

Hello, my old laptop broke. I bought a new one, installed Firefox, and signed into my Firefox account. My add-ons synced, but my passwords and bookmarks are gone. I can't access the old laptop now. Is there a way to fix this without a backup file? Or are add-ons the most I can get? Both devices have been added to the devices in the Firefox account.

Dear Firefox Support Team,

I hope you are doing well.

Could you please advise when Firefox plans to update the current Syrian flag icon to the newer official flag? This update would be highly appreciated, as it ensures accurate and up-to-date representation within the browser.

Thank you in advance for your support, and I look forward to your feedback.

Best regards, Mouhamed Moureb

The installation on my win 11 laptop is doing some odd things (1 - recently lost all extra (unselected) windows on restart, even though set to restore all windows and tabs and 2- opening a new window creates an outdated duplicate of the window I already have open instead of just creating a new window with an empty tab??). So I thought I'd try refreshing it. Well, my "More troubleshooting" page does not have the "Refresh Firefox" button, only the "clear startup cache" appears along with option to run in troubleshooting mode. No Refresh option in teh same page in troubleshooting mode either. I am using the Microsoft Store MSIX installation. I am thinking about uninstalling that one and installing from a Mozilla download instead??

What would be the best way to clean up my installation state since the refresh is not available?

To sync a mobile device, the instructions say to open Firefox browser on mobile, from Menu go to Sign In, aim phone camera at QR code. The 3 lines at the screen bottom right (i'm assuming this is a menu but printing an icon labelled "menu" is less cryptic) offers no sign in opportunity.

Hello

I'm facing a frustrating problem. I asked an AI the following:

Firefox Developer Edition (v145.0.2) on Windows 11 host machine can play udemy.com videos but Firefox Developer Edition (v146.0b9) on Windows hyper-v virtual machine cannot.

I suspect the cause is due to either settings or the virtualisation Hyper-V. Other browsers (Edge, Brave) on the virtual machine can play udemy.com videos with no problems.

Gemini said: This is likely caused by a specific change introduced in Firefox Nightly/Beta (v146) regarding how it handles video decoding on Windows.

The Short Answer: Firefox v146 enabled FFmpeg-based hardware video decoding by default on Windows (previously it relied almost exclusively on Windows Media Foundation). This experimental feature often conflicts with the virtualized graphics drivers (Hyper-V Video) used in your VM, causing the player to fail (black screen or error) while audio might still work or the player simply refuses to load.

Is this true?

Google appears to be taking over control of my firefox page. When I open Firefox, Google search and other functions appear on screen and take over. Also, most of my saved bookmarks have disappeared .This probably happened when I got tech help to deal with problems accessing my MS and Google accounts. I have always used the Google search engine but it only when I clicked on the search bar. Now it seems to have taken over and I seem only to be ableto access sites using Google Can I restore lost bookmarks so I can go direct to internet sites?

I just updated to the latest Firefox. All my history, bookmarks, extensions are now gone. I do not seem to be able to get them back. My old version of Firefox is not available. When I ask to update from a prior browser, the drop down selection does not give me my prior version of Firefox. Help!

How can I get rid of that logo? I tried the "flip flag to false" and it didnt work.. I have downloaded BRAVE and will use if for now.. When someone can explain how to remove it, I will use Firefox again.. I don't like it... I like a clean home page, and would think I can have the option of removing it.