Mac OSX vertical scrolling w/ Firefox

The 2-finger trackpad scrolling on the new iBook causes vertical scrolling to jump really fast on Firefox. The solution is to use a custom number of lines per scroll rather than the default system number of lines. The changes in about:config are:

• mousewheel.withnokey.numlines => 3
• mousewheel.withnokey.sysnumlines => false

Play around with the mousewheel.withnokey.numlines values. To me, 3 seems closest to Safari's behavior but your mileage may vary.