Rated 3 out of 5 stars
Overall it is a very good plugin.
Do you have a site to report defects ?
1. The message list threaded grouping with the arrow on the left that you can collapse and expand does not work in any view except the ALL INBOXES view. It is not working on individual emailboxes. I don't want to have to view all messages in all four of my inboxes at once. I want to have this work on individual email boxes. In addition, it doesn't work on local folder messages lists.
2. The back and forward buttons no longer work after installing this add on. I used to be able to use them to switch back and forth between folders since it would remember where I had been. This add-on seems to have disabled the back and forward navigation buttons so that they no longer work.