Rated 4 out of 5 stars

I don't know what I would do without this addon. It's what Firefox should have done with its TabGroups (which are quite useless as currently implemented compared to this addon). The only issue I'm having with it is related to how new tabs are open. New tabs seem to open up relatively next to the one you are currently on instead of at the end of your list of tabs. Having this configurable would be nice. The other issue is related to when new pages are open on the current tab vs. a new tab. Refreshing the current url by editing it and pressing return, or typing in a new url, will cause it to load that url in a new tab. It would be nice if this was configurable, to enable that new url to load in the current tab. I've tried other tab addons along with this one that allow you to configure that behavior, but none of them appear to work with this addon installed. Again, other than those annoyances, the features this addon brings still make it well worth it.