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

Wannan tattunawa ta zama daɗaɗɗiya. Yi sabuwar tambaya idan ka na bukatar taimako.

can't open or close mozilla firefox

  • 2 amsoshi
  • 1 yana da wannan matsala
  • 13 views
  • Amsa ta ƙarshe daga FredMcD

more options

After we downloaded Windows 10 I haven't been able to open Mozilla firefox. I went to control panel to uninstall and reinstall but when i clicked uninstall a message came up that said I must first close mozilla firefox before uninstalling. I can't close it cuz I can't open.

After we downloaded Windows 10 I haven't been able to open Mozilla firefox. I went to control panel to uninstall and reinstall but when i clicked uninstall a message came up that said I must first close mozilla firefox before uninstalling. I can't close it cuz I can't open.

All Replies (2)

more options

Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) to see if that helps.


You can also check for issue with Microsoft Family Safety on Windows 10. http://windows.microsoft.com/en-us/windows-10/turn-off-microsoft-family-settings

more options

Do you have the Firefox icon on your quick launch? Right click on it, and select Open New Window. Sometimes this works. If it opens, close it by Menu > File > Exit.


This is not a cure but will make it easier if Firefox locks up in Windows. https://support.mozilla.org/questions/997866 {web link}