Please don't make smooth scrolling the default setting for the mouse wheel. I thought I was going crazy trying to figure out why my Chrome browser was doing this weird scroll where it would gradually slow down as I used the mouse wheel. It was incredibly annoying as it would always scroll past what I wanted to read. This feature is awful. Don't turn it on by default, let users turn it on themselves if they want it. It took me ages to figure out it was a mouse setting, not a browser feature.