Hi, I don't think you need to re-download. You just need to sign each Firefox into your Firefox Account and, if you haven't already, look at the Sync settings to determine what categories of data sync among them. * [[How do I choose what types of information to sync on Firefox?]] * [[Sync bookmarks, logins and browsing history on Firefox for iOS]], [[Sync logins in Firefox for iOS]] Note that some data is kept separate and shown in a separate group, such as desktop and mobile bookmarks.