Firefox Environment Backup Extension (FEBE)
FEBE allows you to quickly and easily backup your Firefox extensions. In fact, it goes beyond just backing up — It will actually rebuild your extensions individually into installable .xpi files. Now you can easily synchronize your office and home browsers.
FEBE backs up your extensions, themes, and (optionally) your bookmarks, preferences, passwords, cookies and just about everything else Firefox offers (it can even backup/restore your entire profile).
Version 5.0 allows for user-defined backups. Single files or entire directories can be specified to back up data for programs like Thunderbird, Greasemonkey, etc.
Backups can be performed on demand or scheduled for daily, weekly, or monthly unattended runs.
A comprehensive debug mode allows for troubleshooting complex platforms.