If you use the Internet browser Firefox, you may want to look into a way to back up all of those themes, extensions and settings (I have had several crashes and reinstalling is a time waster.) BackupFox creates backup profiles for Firefox and Mozilla’s Thunderbird email program. The Firefox Deployment program creates similar backups, but it seems to create an entirely new Firefox folder, hence taking up unnecessary space. MozBackup, the predecessor to BackupFox, has a similar clean interface and backs up the latest FF /Thunderbird profiles and even Mozilla 1.6. Here’s some more 411 on Mozbackup. If you’re looking simply to back up your FF/Thunderbird extensions, go for the Mass Installer (cumbersome at first, but well worth it!)