Rated 4 out of 5 stars
Amendment to my previous review - was able to manually add the 'Next Tab Group Button' from the toolbar customise menu - all now working.
Rated 3 out of 5 stars
FF9.01 The modified Tab Group Button works - very useful. But the new 'Next Tab Group Button' doesn't appear (I have 3 Tab Groups, I've loaded panorama view, I've restarted twice - still no joy)