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Will not permit me to load an old profile. Your instructions on the recovering data page just feed me into an endless loop of prompts to create a new profile.

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  • 最近回覆由 cor-el

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Will not permit me to load an old profile. Your instructions on the recovering data page just feed me into an endless loop of prompts to create a new profile.


The old profiles had my logins for work. I would prefer not to have to spend hours resetting something like 15-20 logins and profiles and then the next two months forgetting what the new ones are.

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Hi andrewchalk88, are you running the Extended Support Release of Firefox 68, or are you running a current version with a modified user agent string?

Generally speaking, older versions of Firefox won't run a profile folder from a new version. However, you may be able to transplant just this one pair of files if the format hasn't changed too much to be used in an older version:

  • logins.json
  • key4.db

有幫助嗎?

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You can copy files like these with Firefox closed to the current profile folder to recover specific data.

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.


  • bookmarks and history: places.sqlite
  • favicons: favicons.sqlite
  • bookmark backups: compressed .jsonlz4 JSON backups in the bookmarkbackups folder
  • cookies.sqlite for the Cookies
  • formhistory.sqlite for saved autocomplete Form Data
  • logins.json (passwords) and key4.db (58+) or key3.db (57 and older) (decryption key) for Passwords saved in the Password Manager
    if you only have key3.db then make sure to remove an existing key4.db
  • cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager
    if you only have cert8.db then make sure to remove an existing cert9.db
  • persdict.dat for words you added to the spelling checker dictionary
  • permissions.sqlite for Permissions and possibly content-prefs.sqlite for other website specific data (Site Preferences)
  • sessionstore.jsonlz4 for open tabs and pinned tabs (see also the sessionstore-backups folder)

有幫助嗎?

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