Comment 1 for bug 30762

Greg Michalec writes ("[Bug 30762] firefox pages front/back on touchpad horizontal scroll"):
> Firefox ships with mousewheel.horizscroll.withnokey.action set to 2,
> which maps the horizontall scroll action to front/back page. This can be
> a real pain for touchpad users, when just moving your mouse around can
> cause pages to jump. I'm not sure whether the proper solution would be
> to set the firefox mousewheel.horizscroll.withnokey.action value to 0,
> which would disable the horizontal scroll action (horizontal scroll +
> [alt|meta|ctrl|shift] remain enabled), or to disable the horizontal
> scroll feature for touchpads (i use the synaptics driver) by default.

This setting of mousewheel.horizscroll.withnokey.action is default in
upstream and I'm reluctant to change it.

Why does horizontal mouse movement generate horizontal scroll events ?
This sounds like a problem with your touchpad driver.

Ian.