Tbh ff has done that for years, at least for me with logitech mice. SmoothWheel amo was created to fix that 4 years ago. Makes me wish the scrolling built into all browsers would make more of an effort to even try to imitate it.
Ooh nice. Seems to work well if you have a mouse with a notchless scroll wheel, just tried it with my Logitech MX and it works nicely.