How to run Firefox when your profile is missing or inaccessible

If you moved, renamed, or deleted your Firefox profile folder

Firefox stores your user data and settings in a special profile folder and pulls information from this folder every time you start Firefox. The default profile folder location is under the %APPDATA%\Mozilla\Firefox\Profiles folder.

Profile was moved or renamed

If you know where your profile is, try one of the following methods to help Firefox find it.

  • Move the profile folder back to its original location.
  • Restore the profile's original name if you've changed it.
  • Create a new profile using the Profile Manager using the instructions to start the Profile Manager when Firefox is closed. Give it a descriptive name, click on the 'Choose Folder' button, and then select the profile folder you moved or renamed, before you finish the Create a new profile wizard.

Profile was deleted

If you deleted or lost your profile folder and have no way of restoring it, use one of these methods to create a new Firefox profile:

  • Method 1: Use the Profile Manager wizard

Follow the steps in the Profile Manager - Create, remove or switch Firefox profiles article to create a new profile.

  • Method 2: Manually delete the profiles.ini file

If you have problems accessing the Profile Manager, you can create a new default Firefox profile by deleting the profiles.ini file, using these steps:

  1. Click on the Windows Start button or press the Windows key Windows Key to open the Start Menu.
  2. Type %appdata% (as you type, a Windows search will start) and press the Enter key. The hidden AppData\Roaming folder will open.
  3. Double-click the Mozilla folder.
  4. Double-click the Firefox folder.
  5. Delete (or rename, for example, to profiles.iniOLD) the profiles.ini file.

When you start Firefox, a new profile will be created.


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Revision #2
Created 2 years ago by Ghicel Santos
Updated 2 years ago by Ghicel Santos