Fixing Firefox on Powerbook

Thanks to ITweaks I finally found how to fix this very annoyning problem with Powerbook touchpad and Mozilla Firefox (OSX):

"In Firefox, type about:config into the address bar and hit return. This gives you a list of all possible configuration options. The ones we want are those that start with mousewheel.horizscroll.withnokey. Make the following changes by double-clicking the appropriate option in the list:

* mousewheel.horizscroll.withnokey.action => 0
* mousewheel.horizscroll.withnokey.sysnumlines => true
"

See Mac OS X Hints for more details.