Redundant Rated 1 out of 5 stars
As others have mentioned, this panel doesn't update itself. After reading all the unread e-mails in its Unread view, the folders are still displayed - unless you toggle to a different one of its views and return or change focus to a folder in a different panel. There is no on-the-fly update of this add-on's panel. It requires forcing a manual repaint of this panel. Also, I don't see the point of this add-on. I have Tbird 18.104.22.168. There are already All, Unread, Recent, and Favorite view for this standard Folders panel.