This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

Firefox goes to full screen mode on its own

  • 1 reply
  • 6 have this problem
  • 3 views
  • Last reply by cor-el

more options

Since FF7, FF will go into full screen mode by itself. This will happen when the computer starts up, resumes from sleep mode, FF is restored from the task bar or between web sites. Suggestions?

Since FF7, FF will go into full screen mode by itself. This will happen when the computer starts up, resumes from sleep mode, FF is restored from the task bar or between web sites. Suggestions?

All Replies (1)

more options

Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).