however ,one of my first concerns was the hopeless mouse scrolling in Fx. But you don't need an extension, try this. http://www.applepedia.com/Firefox_mouse_wheel_scrolling. I've set mine to 5, and I apologize in advance if this is common knowledge.
Are you talking about using the scrolling tiny feature when you press the middle button on the mosue? It's slow on FireFox.
No, just normal centre wheel scrolling. The default setting feels slow to me having just switched from IE. This all comes down to personal preference of course.