davidnottingham
It doesn't seem to work under Ubuntu at present.

BackupBird is in alpha state!
BackupBird is an AddOn to provide basic, platform-independent backup support to save and restore Preferences and important Library information (think about profile crashes or other terrible things).
You can find it in the Tools-Menu.
Be careful: Restoring Backups will overwrite Data!
It backups the "about:config" Preferences and optionally a RatingFile; RatingFile is required to install BackupBird (if a developer out there knows a better solution than hard-linking the .properties and .js, please leave a comment ;) ).
Requires:
RatingFile
Features:
Version 0.9
Backup Manager
Preference (about:config) Backup
RatingFile Backup
Restore Preferences Dialog to choose parts of about:config
Will come in future releases:
Auto-Backup via time-interval
Maybe Backup more things (Like AddOns, real Library... Ideas? Post!)
Known Bugs:
-Not all Preferences are saved, if somebody knows a better way or an additional way to get Preferences than the nsIPrefService, please post!
-Some problems with the UI between restoring and restarting; maybe I'll add an auto-restart later.
If you like the Add-On you might translate it into your language:
Click here to go to Babelzilla.org
If the Add-On doesn't work at your machine, please post here!
Please post a comment and/or rate, don't be afraid posting bugs and ideas!
-Added other System to restore preferences,
-choose preferences in tree-view
-added list of dangerous preferences (not sure if complete)
ruipenunes
Hi rsjtdrjgfuzkfg!
Just wanted to say I've already tried the add-on.
I've posted something about the experience at get satisfaction:
- http://gsfn.us/t/8syr
Thanks a lot for your work!