Rated 5 out of 5 stars

Yes, finally such an add-on is available! People have been waiting for more than 3 years! http://forums.mozillazine.org/viewtopic.php?f=28&t=1947737

"Mark Junk Read" does exactly what it is supposed to do and works great. Thanks to the developer!

This review is for a previous version of the add-on (1.01).