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Recover user data

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  • 1 has this problem
  • 8 views
  • Last reply by cor-el

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Newest version of Firefox created extreme issues with my iMac. Did everything possible to try and remedy slow opening, crashes, freezes, etc so I used TimeMachine and installed previous Firefox version but in process I lost all my bookmarks, etc. Firefox created folder of old user data and placed it on desktop called: Old Firefox Data. However, everytime I go through process of trying to reinstall it via Firefox help page under Profile, all I get pulled up to reinstall is Safari or Chrome. How do I get Firefox to pick up Old Data File?

Newest version of Firefox created extreme issues with my iMac. Did everything possible to try and remedy slow opening, crashes, freezes, etc so I used TimeMachine and installed previous Firefox version but in process I lost all my bookmarks, etc. Firefox created folder of old user data and placed it on desktop called: Old Firefox Data. However, everytime I go through process of trying to reinstall it via Firefox help page under Profile, all I get pulled up to reinstall is Safari or Chrome. How do I get Firefox to pick up Old Data File?

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What kind of issues did you encounter when you updated to Firefox 94 ? Note that Firefox 94.0.1 has some fixes for Mac.


You can check the compatibility.ini file in a profile to see what Firefox version last used the profile. Downgrading a profile is not advised as files and folders might have been upgraded to a newer schema making them incompatible and possibly get data loss with a next update, so using a Firefox 94 profile with Firefox 93 is rejected.

Firefox 67 and newer use a dedicated profile for each Firefox installation and lock this profile to prevent other Firefox installations from using this profile.