Rated 4 out of 5 stars
I hadn't used the TB tabs for messages because deleting a tabbed message wouldn't close the tab. For this reason I couldn't use many of the tabbing features on the QuickFolders add-on. With Deselect-On-Delete installed, simply pressing DEL on a tabbed message not only deletes the message but closes the tab as well.
Simple, effective and... almost perfect. I use Lightning (calendar) in a tab as well. It would be nice to return to the previously accessed tab or first tab (Inbox) when the tab closes on delete instead of the last open tab.