Since it's a touchpad, you probably didn't think of looking for this setting under "mouse wheel"! You can disable the Command + mouse scroll wheel / swipe touch pad 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) {MAC} Double-click the '''mousewheel.with_meta.action''' preference to display a dialog where you can enter the desired value, change '''3''' to '''1''' and then click OK (4) 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?