Join the Mozilla’s Test Days event from Dec 2–8 to test the new Firefox address bar on Firefox Beta 134 and get a chance to win Mozilla swag vouchers! 🎁

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 will not open

  • 2 replies
  • 1 has this problem
  • 1 view
  • Last reply by FredMcD

more options

Whenever I click on Firefox to open it very quickly flashes profile not found and closes and I cannot open the profile manager at all in any way and when I go to files to look at my profiles there is no profile in there I've tried doing things in command prompt and even running firefox in administrator and the profile manager in administrator but neither will open and I don't know what to do? is there anything I can do to try and fix it to get firefox to even launch or open at all?

Whenever I click on Firefox to open it very quickly flashes profile not found and closes and I cannot open the profile manager at all in any way and when I go to files to look at my profiles there is no profile in there I've tried doing things in command prompt and even running firefox in administrator and the profile manager in administrator but neither will open and I don't know what to do? is there anything I can do to try and fix it to get firefox to even launch or open at all?

All Replies (2)

more options

and i forgot to mention i have tried uninstalling and reinstalling in MULTIPLE different ways

more options

https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible

http://kb.mozillazine.org/Profile_folder_-_Firefox#Navigating_to_the_profile_folder

https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

https://support.mozilla.org/en-US/kb/recover-user-data-missing-after-firefox-update