Files created on startup

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Mozilla applications store personal information in a profile folder. In Firefox and Thunderbird, as well as in SeaMonkey 2 (currently in Alpha testing), if you choose a custom location for your profile and select a folder that is not empty, files and folders belonging to the Mozilla profile will be added to that folder's contents. If you delete the Mozilla files and folders, they will be recreated the next time you use the application.

WARNING! Never create a new profile in a location that contains other valuable data, such as your Desktop or My Documents. Doing so may result in loss of all data in that location if you later delete the profile, as explained here and in the bug reports listed below.

For example, if you create a new Firefox profile and choose the Desktop as the folder location, you will see files and folders belonging to your Firefox profile, such as these, appearing on the desktop (other Firefox profile contents are listed here):

To resolve this problem you will need to use a different location for your Firefox or Thunderbird profile. Follow these steps carefully:

  1. Completely close your Mozilla application (File -> Exit).
  2. Start the Profile Manager.
  3. Delete all profiles. Do not select "Delete Files". If you select "delete files", everything in the profile location will be deleted (e.g., the entire contents of My Documents) , not just the profile files. Select "Don't Delete Files".
  4. Create a new profile in the default location.
  5. Start the application with the new profile.
  6. You may now delete the files without them being recreated (see Transferring data to a new profile for data you may wish to salvage).

Related bug reports