Works 100% in v11.0 Rated 5 out of 5 stars
FIVE STARS! I first met this addon in an infantile version many moons ago when all it really did was hide a single tab, one at a time and that was pretty much it. Kudos to the developer (who goes by the name of diegoratt) for diving head first into this addon and making it compatible with FF 11.0.
I noticed that another FF 11.0 user wrote a review about this addon not working, I can only guess that s/he has another addon that is conflicting with this one. As I said above, this addon is working 100% for me under FF v11.0.
I highly recommend this addon and have rated it five stars after deliberate stress-testing of all functionality.