As far as making Firefox more mac like the theme that comes by default uses the real aqua gui elements, the theme only works for the mac version due to this. If you don't like some of the stuff, i suggest trying to contact someone who works on the firefox gui for the mac and maybe make some suggestions.. i was thinking of doing the same and getting a few things that irritated me fixed.. if all else fails i may end up just making my own extension that changes some of the keyboard shortcuts to those that I like... in which case i'd make it available to everyone else...