Software to export firefox addons

I used CLEO and FEBE until I found MozBackup. Is far easier to use and allows you to backup and restore bookmarks, mail, contacts, history, extensions, passwords, etc.

Look at CLEO and FEBE.

FEBE (Firefox Environment Backup Extension) 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.

CLEO (Compact Library Extension Organizer) is a Firefox extension that works with FEBE to package any number of extensions/themes into a single, installable .xpi file.

^{also, OPIE (Ordered Preference Import/Export) is a Firefox extension that allows you to import and export your installed extension preferences. This is useful when installing extensions in a new profile, or synchronizing multiple Firefox installations.}

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I also keep my profile backed up for recovery and to start using it on a new machine.