Package request: Firefox Sync
Firefox Sync is a browser synchronization feature that allows users to partially synchronize bookmarks, browsing history, preferences, passwords, filled forms, add-ons and the last 25 opened tabs across multiple computers.
http://docs.services.mozilla.com/howtos/run-sync.html
(from redmine: issue id 2218, created on 2013-08-10, closed on 2019-05-03)