Ottimo,
queste sono le risposte del browser:

Netscape:
Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.4) Gecko/20030624 Netscape/7.1

Explorer:
Mozilla/4.0 (compatible; MSIE 5.23; Mac_PowerPC)

FireFox:
Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; rv:1.7.3) Gecko/20040913 Firefox/0.10.


Grazie
ciao