[acjohnson55]

I was also very, very concerned about Tree Style Tabs. It's one of the main differentiators Firefox has for me over Chrome. Very happy it's mostly been preserved. I really only care about having my tabs on the side, not necessarily the nesting.

[tetraca]

I personally find the nesting excellent because I am a junkie that opens 90 tabs at a time meandering through the internet and it gives a way to trace my context/history.