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CloseReview for Extra Folder Columns by ayoiunes
Rated 1 out of 5 stars
This version does not work with Thunderbird 3.0 for Max OSX Snow Leopard. It states that the add on is incompatible with Thunderbird 3.0
This review is for a previous version of the add-on (0.3).To create your own collections, you must have a Mozilla Add-ons account.