I could never get smooth scrolling to work on Linux in any mainstream web browser, most people don’t seem to see it, but I’m sensitive to things like that.
Like with a laptop trackpad? I'm smooth-scrolling through these comments right now, and don't remember when scrolling wasn't smooth by default on any trackpad.
It’s smooth to a point, but not smooth like OS X is. It might have improved (I think I last tried desktop Linux a year ago). I do enjoy using Linux as my default headless OS.
