Trying this with different browsers on Windows highlights how bad the pan acceleration curves are in Firefox and Chrome. In Chrome there are exactly 2 speeds wh

Trying this with different browsers on Windows highlights how bad the pan acceleration curves are in Firefox and Chrome. In Chrome there are exactly 2 speeds where this works usefully, and they're a pixel apart. In Firefox there's a small handful of them, and you have to be fairly careful with your mouse. In Opera 12 on the other hand there's a range of about one inch of mouse movement on the screen, where you get, pixel-for-pixel, different speeds for this thing, all of them useful.