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CloseReview for Extra Folder Columns by Chris Hecker
Rated 4 out of 5 stars
Alright, it was driving me nuts, so I just went and fixed it...you can download the new xpi here: http://chrishecker.com/Miscellaneous_Technical_Stuff#Thunderbird
This review is for a previous version of the add-on (1.0).To create your own collections, you must have a Mozilla Add-ons account.