Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

i cannot start firefox with message your firefox profile cannot be loaded. It may be missing or inaccessible

  • 2 replies
  • 3 have this problem
  • 146 views
  • Last reply by cor-el
  • Archived

tonygiang
tonygiang

i cannot start Firefox with message "YOUR FIREFOX PROFILE CANNOT BE LOADED. IT MAY BE MISSING OR INACCESSIBLE"

i cannot start Firefox with message "YOUR FIREFOX PROFILE CANNOT BE LOADED. IT MAY BE MISSING OR INACCESSIBLE"

All Replies (2)

ideato
ideato

Hello tonygiang, please see : How to run Firefox when your profile is missing or inaccessible

thank you

cor-el
cor-el
  • Top 25 Contributor
  • Moderator

This is usually caused by a problem with the profiles.ini file and the profile marked as Default=1 in this file is no longer present on the hard drive.

  • Windows: %AppData%\Mozilla\Firefox\
    C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles\<profile>\
  • Linux: ~/.mozilla/firefox/
  • Mac: ~/Library/Application Support/Firefox/

You can use one of these to make Firefox create a new default profile or reuse an existing profile:

  • Delete the profiles.ini file to force Firefox to create a new default profile
  • Use the Profile Manager to create a new profile
    Use "Choose Folder" when you create a new profile to select the location of a lost profile and recover this profile