FF 17.0.1 Rated 4 out of 5 stars
Great addon of all time! Thanks developer for his hard work!
Some differences/problems with 17.0.1:
1. middle-click on link does not group by opener.
2. if tabs searched and FF crash, other tabs are lost in restore!
3. tab bar on LHS, will overlay URL balloon when mouse over link.
Keep up the good work : )
Hmmm can you try beta 5?
If there are still bugs, just submit issues to Github repo