FEBE - Firefox Environment Backup Extension which allows you to instantly backup all your installed Firefox Extensions along with themes, preferences, cookies and much more. FEBE also rebuilds your extensions individually into installable .xpi files

FEBE also allows you to automatic or manual Backup uploads to your Box.net account which you can use to synchronize Firefox in your Home or Office. FEBE Perform backups on demand or schedule daily, weekly, or monthly unattended runs. Sequential backups can be stored in timestamped directories so you can restore back as far as you like.

http://customsoftwareconsult.com/extensions/FEBE6.2.0.xpi

i'm just wondering if we can restore the backup onto the firefox portable one, i tried on MozBackup, cannot la... or is it something to do with tweaks or something else...