Rated 3 out of 5 stars
I liked the IE8 tab grouping feature and wanted to have it in Firefox. This add-on has been pretty handy to do this. But I'm frustrated to see drag-n-sort between the same group of tabs doesn't work. I wanted to drag the last tab of a group in the midst position, and I couldn't. It will be nice to have this issue looked after in the next version. I'll definitely give it a 5 star then.This review is for a previous version of the add-on (1.1.4).