We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

updated Firefox, now browser won't open- says profile not accessible

  • 4 replies
  • 2 have this problem
  • 5 views
  • Last reply by smorele

more options

Any help is greatly appreciated. I updated Firefox and when I tried to reopen the browser, got an error message that my profile was not accessible. I couldn't run the profile manager either. Uninstalled and reinstalled Firefox. Nope. Uninstalled again, went to %appdata% and deleted remaining files. Reinstalled, and was able to open Firefox. When the browser was closed, it gave me the error message that my profile was not accessible again. Any suggestions, please?

Any help is greatly appreciated. I updated Firefox and when I tried to reopen the browser, got an error message that my profile was not accessible. I couldn't run the profile manager either. Uninstalled and reinstalled Firefox. Nope. Uninstalled again, went to %appdata% and deleted remaining files. Reinstalled, and was able to open Firefox. When the browser was closed, it gave me the error message that my profile was not accessible again. Any suggestions, please?

All Replies (4)

more options

Hello, can you access your profiles with the Profile Manager? Use the Profile Manager to create and remove Firefox profiles

more options

Hello Smorele, no, I get the same error message: "Your Firefox profile cannot be loaded. It may be missing or inaccessible."

more options

Also tried importing Firefox bookmarks to Chrome and got the error message: "Sadly, your Mozilla Firefox settings are not available while that browser is running. To import those settings to Google Chrome, save your work and close all Firefox windows. Then click Continue." ...except Firefox isn't running. No idea what is going on here.

more options

Hello, please check if you have a Firefox process running and this article may help you.