Rated 5 out of 5 stars
The add on is like a torch in a dark house! really down to purpose of build. I love it & I recommend to my friends who work with Thunderbird.
It would be great if the behavior could be the same i.e. in reading email panel behaved as in preview pane (F8) .
Plus, on MS Windows platform works better than on Ubuntu.
However, that's a great tool!