Very cool; yea QuickFolders Rated 5 out of 5 stars

I have a lot of correspondents so the default tree of folders is extensive. QuickFolders makes it easy--and fast--to get to the folders of those I most frequently correspond with. Thunderbird's "filters" put incoming messages directly into appropriate folders. QuickFolders lets me know what messages I have not yet read as well as to remind me to check the status of ongoing conversations. Being able to drag and drop directly into a folder is great. Making the folder tabs more attractive is icing on the cake... and functional, too. Overall, a really welcome timesaver. Thank you, Axel.

This review is for a previous version of the add-on (3.1).