Rated 4 out of 5 stars

1. No ability to disable FLST, but enable Tab Flip.2. My previous comment with fix for that mysteriously disappeared.
UPD. OK, fabianswebworld, no probs.

This review is for a previous version of the add-on (1.1.4.1-signed). 

Thank you for your comment.
1. Sorry that "FLST" has no ability to disable "FLST" at the moment ;) But I also plan to include an option to seperately control FLST and Tab-flipping, as well as some more improvements. At the moment I simply don't have the time to work on it.

2. I did not delete any of your comments. In fact, I also wonder why it has disappeared and I assume Mozilla regarded it as spam as it included a link to one of those share-hosters. As FLST for FF4+ is licensed under the Mozilla license, feel free to create your own version and upload it here (or anywhere else) as long as you give credits / attribute to the creators of the predecessors! :)