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

No matter what I try, I cannot get Firefox to open, except in Windows 10 safe mode - not Firefox safe mode (won't open), Win 10 safe mode

  • 3 replies
  • 2 have this problem
  • 18 views
  • Last reply by FredMcD

more options

Tried refresh, change profile, reinstall, delete profile, delete all Firefox folders in C drive, open in Firefox safe mode (won't open) - I have tried every trick on the official 'Firefox won't open' advice page - no luck. Yet it will open using Win 10 safe mode... ... please help if you can.

Tried refresh, change profile, reinstall, delete profile, delete all Firefox folders in C drive, open in Firefox safe mode (won't open) - I have tried every trick on the official 'Firefox won't open' advice page - no luck. Yet it will open using Win 10 safe mode... ... please help if you can.

All Replies (3)

more options

benzyone said

. . . . except in Windows 10 safe mode . . .

When a computer is started in Safe Mode, only system programs are running. As a test, disable your protection programs.

more options

Thanks for the suggestion, unfortunately it didn't work for me.

My fix - run FF in Win 8 compatibility mode. Only thing that worked. Imperfect but a workaround nonetheless.

more options

I called for more help.