I tried it recently and it was buggier and slower than in 2011. It's pretty heartbreaking for me, I don't want to do it. I heard that it wasn't going to be pos

I tried it recently and it was buggier and slower than in 2011. It's pretty heartbreaking for me, I don't want to do it. I heard that it wasn't going to be possible to do tree style tabs, but Mozilla hacked it enough so that it would work, and convinced the original author to re-implement it. It feels like a hack. This is not progress.