I usually use Opera, and my next go-to browser is Firefox.
I'm on Linux (Mageia) and Opera has the least Flash problems I've encountered and is one of the fastest compared to some others. Just wish it would be more up-to-date compared to the Windows counterpart where it's hella fast although it doesn't have as many features.
Firefox has definitely grown a lot and IMO they've really dealt with the memory problems well and is definitely a lot faster than several releases ago.
Chrome is alright but it's a bit bloated on Linux for some reason. I'm not sure why a browser would need a 60MB+ package to be installed so it's definitely not as fast as Opera or Firefox. Also I'm still worried about privacy. :cens: