A free program for Windows, by MozBackup.

MozBackup is a utility for creating backups of Mozilla Firefox, Mozilla Thunderbird, Mozilla Sunbird, Flock, SeaMonkey, Mozilla Suite, Spicebird, Songbird, and Netscape profiles.

You can export your bookmarks, contacts, history, extensions, passwords, cookies, and other things to an XML file, which can be restored later. You can also export your settings, which are saved to an XML file.

MozBackup is designed to be used by people who back up their web browsers. It can back up Firefox, Thunderbird, Sunbird, and Flock. You can also backup your settings and data.

You can restore the backup you created on any browser. You don’t have to restore it on the same browser. You can restore it on another browser, even on a different one.

MozBackup is a simple utility for creating backups of Mozilla Firefox, Mozilla Thunderbird, SeaMonkey, Mozilla Suite and Netscape profiles.

It allows you to backup and restore bookmarks, mail, contacts, history, extensions, cache etc.