Mac OSX horizontal scrolling w/ Firefox

By default, the horizontal 2-finger scrolling feature on the new iBook trackpad causes Firefox to move backwards and forwards in the history list - quite annoying. This Mac OSX Hints page tells you the Firefox about:config preferences to set to change that. In short:

• mousewheel.horizscroll.withnokey.action => 0
• mousewheel.horizscroll.withnokey.sysnumlines => true