You can copy files from the Firefox profile folder on one computer to the profile folder on another computer by copying the files to a removable USB stick (jump drive). You can copy files like these to the Firefox profile folder to recover specific data. * bookmarks and history: places.sqlite * bookmark backups: JSON backups in the bookmarkbackups folder * SQLite files like cookies.sqlite (cookies) and formhistory.sqlite (saved form data) * logins.json and key3.db (decryption key) for Passwords saved in the Password Manager * cert8.db for stored intermediate certificates (Certificate Manager) * persdict.dat for words you added to the spelling checker dictionary * permissions.sqlite and possibly content-prefs.sqlite for Permissions and Site Preferences * sessionstore.js for open tabs and pinned tabs and tab groups You can recover more personal data. See also: *https://support.mozilla.org/kb/Recovering+important+data+from+an+old+profile *http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox ---- For Sync, see: *https://support.mozilla.org/kb/what-firefox-sync *https://support.mozilla.org/kb/how-do-i-set-up-firefox-sync *https://support.mozilla.org/kb/add-a-device-to-firefox-sync