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I need to transfer bookmarks and passwords to a new Firefox

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mrj001
mrj001
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I have bookmarks and saved passwords from an old computer (x86) that I want to import to a new computer (M1).

I have the drive with all my old files on it, and can mount it on my new computer. It is not possible to boot the old computer to export my files. How can I migrate them using purely file operations to the new Firefox?

I have bookmarks and saved passwords from an old computer (x86) that I want to import to a new computer (M1). I have the drive with all my old files on it, and can mount it on my new computer. It is not possible to boot the old computer to export my files. How can I migrate them using purely file operations to the new Firefox?

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cor-el
cor-el
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You can use the button in "Help -> More Troubleshooting Information" (about:support) to go to the current Firefox profile folder or use the about:profiles page (Root directory).

Firefox uses two locations in the hidden "AppData" location for the Firefox profile folder. One location in "AppData\Roaming" for personal data like bookmarks and logins and another location in "AppData\Local" for temporary files like the disk cache.

Primary location used for the main profile that keeps your personal data (Root Directory on about:profiles).

  • C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles\<profile>

You can copy certain files with Firefox closed from one profile folder to your current profile folder to transfer your personal data. Note that best is to avoid restoring a full profile folder and only restore important files that are safe to restore/transfer.

  • 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 (encrypted logins) and key4.db (encryption key/primary password) for logins saved in the Password Manager
  • cert9.db for certificates stored in the Certificate Manager
  • persdict.dat for words added to the spell 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)

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