Could you describe what gestures are involved? Perhaps it would be helpful to disable "mouse scroll wheel" zooming in case part of the touchpad is (in Firefox's view) emulating that control. Here's how: You can disable the Ctrl + mouse scroll wheel from doing anything special as follows: (1) In a new tab, type or paste '''about:config''' in the address bar and press Enter/Return. Click the button promising to be careful or accepting the risk. (2) In the search box above the list, type or paste '''wheel''' and pause while the list is filtered (3) Double-click the '''mousewheel.with_control.action''' preference to display a dialog where you can enter the desired value, change '''3''' to '''1''' and then click OK ''These are the possible values:'' * 0 => do nothing * '''1 => scroll''' * 2 => emulate back/forward buttons * 3 => zoom (default setting) * 4 => horizontal scroll * 5 => zoom (pinch zoom; not sure how this is different) Does that help?