Some Lion OSX swipe features don't work in Firefox 5
I just upgraded to Lion OSX and when using Firefox 5 I can no longer use swipe commands on the trackpad to move backward and forward between web pages. I opened Safari and these features work fine. Prior to upgrading to Lion, all of these features worked in Firefox 5.
Opaite Mbohovái (1)
Firefox developers should be well aware of these; and similar problems with supporting some of the Lion OSX. There are some possible work-arounds. I am not sure what if any progress the developers are making. I certainly have not seen much in the way of official comment, but I am not a Mac user myself.
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