FEBE and CLEO are two fantastic Firefox extensions which allow you to backup all your personal Firefox settings. FEBE is a multiplatform add-on (Linux, Windows, and OS X) easy to install and to manage. In fact, the “FEBE Options” is a complete menu where it is possible to choose: what to save, where (destination folders) and frequency of the backups. Personally, I do suggest to change the default options and not to backup your usernames, passwords and cookies using FEBE. In fact, the backup file, a .xpi, could be stolen and easily reinstalled on a third part computer. Last but not least I want to underline the key role of CLEO which allows FEBE to create the installable .xpi file with all your settings. Recommended!