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+Migrate your personal stuff from the old profile by copying appropriate files from backup and place them into the new profile (or read [here](https://support.mozilla.org/kb/profiles-where-firefox-stores-user-data#w_what-information-is-stored-in-my-profile)):
+
+* `cert9.db` - Certificates
+* `content-prefs.sqlite` - Site-specific preferences
+* `favicons.sqlite` - Bookmarks icons
+* `handlers.json` - Download actions
+* `key4.db` - Passwords
+* `logins.json` - Passwords
+* `permissions.sqlite` - Site-specific preferences
+* `persdict.dat` - Personal dictionary
+* `pkcs11.txt` - Security device settings
+* `places.sqlite` - Bookmarks
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