are a pair of Firefox extensions for backing up your Firefox extensions. FEBE takes an installed extension and repackages it as an installable .xpi file. It will also optionally back up themes, bookmarks, passwords, etc. CLEO is a second extension from the same author that will take a number of extensions or themes of your choosing and package them all as a single .xpi, so they can all be installed at once. Unfortunately FEBE and CLEO are Windows-only, but if you run WIndows and find yourself installing Firefox or creating new profiles with the same extensions often, or just want a nice backup solution, FEBE and CLEO are definitely worth checking out.