Review for Extra Folder Columns by S AdM
Rated 1 out of 5 stars
Does not work with Thunderbird 3.0! I don't want to fiddle around in files to have it work. Please update it!
Anyhow, why was this feature deleted from Thunderbird?
It is so basic! I can't understand this!
To create your own collections, you must have a Mozilla Add-ons account.