I found a nifty extension that works well for my tablet- where I don't have a mouse and scroll wheel.
It's called
Grab and DragEnables Adobe Acrobat-style grab and drag scrolling, Flick gestures, and Momentum scrolling in Firefox, Thunderbird, and Flock. Especially useful for Tablet PCs, UMPCs, and other pen or touchscreen devices.
Nice! Win7 also has 'flicks' to configure for system-wide use.
Oh- and a biggie I just fixed was blocking
http://s7.addthis.comwith adblock+. That gets rid of the nasty pop-up-and-block-content action of 'share this' links on pages. Freedom!!