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

Avatar for Username

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
Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.
Cartlannaithe

Browser not opening full screen

Firefox Troubleshooting
cor-el replied 2 bhliain ó shin
mark208
mark208

Hello, when I open the Firefox browser from my taskbar it does not open as a full browser page as Image 3.

I have to click on the full-screen icon twice to get it open in full screen as in Image 4.

Please can you help?

Hello, when I open the Firefox browser from my taskbar it does not open as a full browser page as Image 3. I have to click on the full-screen icon twice to get it open in full screen as in Image 4. Please can you help?
Attached screenshots

All Replies (1)

cor-el
cor-el
  • Stiúrthóir

Try to rename/remove xulstore.json in the Firefox profile folder with Firefox closed.

You can use the button on the "Help -> More Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page (Root directory).