Rated 4 out of 5 stars

looks good, logical and eases reading of several mails simultaneously. Was it too difficult to make a version that works with TB2 AND 3?

As a new user, I'm reluctant to move to TB3 permanently until it comes off beta and my other extensions shown to work, but this is one extension I'd like to use now, with TB2

This review is for a previous version of the add-on (0.1.17).