|User since||August 13, 2014|
|Number of add-ons developed||0 add-ons|
|Average rating of developer's add-ons||Not yet rated|
Firefox 40 dev edition Rated 5 out of 5 stars
5 stars because I'm using for a very long time and it is an essential tool for heavy tab users like me. It seems since Firefox 40, a lot of things have changed the behavior of tree style tab. Can't put on the right side anymore. Full screen, resizing windows have weird side effects, etc.
Good luck Piro for new versions if any.