I have become very used to swiping with two fingers on a Magic Mouse to navigate through web pages in Firefox. I downloaded Lion today and when you swipe with two fingers, you switch between Mission Control Spaces. In system preferences, you cannot change the gesture for space switching -- the only option is "on" or "off". Does anyone have any suggestions for resolving this issue? The optimal solution would be to have the two finger swipe navigate pages in Firefox, whereas a three finger swipe, for instance, would correspond to Mission Control. Thanks!