Could not open computer after upgrading firefox

The service of the user Service has no connection.
User profile cannot be loaded.

A possible/probable cause is a problem with the file profiles.ini and the profile marked as the default value = 1 in this file is no longer present on the hard drive.

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

You can use one of them to make the Creation/use of a new default profile for Firefox:

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

Tags: Firefox

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