The check that we have in FullScreen.useLionFullScreen is limited to only checking if the user is on Lion. With Mountain Lion coming, that check needs to be expanded.
I think using parseFloat (or even parseInt) on Services.sysinfo.getProperty("version") should be good enough.
10.6.x -> 10.x (Snow Leopard)
10.7.y -> 11.y (Lion)
10.8.z -> 12.z (Mountain Lion)
Created attachment 621105 [details] [diff] [review]
*** Bug 775325 has been marked as a duplicate of this bug. ***