Review for FolderCheck by Thiemo Nagel
Rated 5 out of 5 stars
FolderCheck is a nice improvement. In my opinion however it only goes half of the way. What I'd really like to see is one big window containing a list of all folders, in which I can easily set not only the "check" flag for a group of folders, but also Retention Policy, Offline, etc.
To create your own collections, you must have a Mozilla Add-ons account.