Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Full screen mode doesn't work (black screen)

  • 2 replies
  • 1 has this problem
  • 98 views
  • Last reply by erwin161

When I trying to enter the full screen mode (pressing f11) I only seeing black screen.

When I trying to enter the full screen mode (pressing f11) I only seeing black screen.

All Replies (2)

What OS? Try downloading a separate copy of Firefox and run it from the folder(do not sign into you Firefox account) to see what happens.

https://www.mozilla.org/en-US/firefox/all/#product-desktop-release

Linux, Manjaro distro with KDE on it. I tried to do what you suggested and nothing changed. But, I tried to make my taskbar always visible (it had auto-hide property) and now full screen mode is working. I had been trying other browsers (with auto-hide property turned on) and all was working.