In a recent bug fligtar was nice enough to run some stats for me on platform strings passed in extensions.update.url via the %APP_OS% client variable in Firefox. He found some interesting results:
WINNT Darwin Linux linux-gnu SunOS FreeBSD linux winnt darwin OS2 OpenBSD NetBSD BeOS DragonFly IRIX64 AIX HP-UX NTO solaris2.10 OSF1 penis
Fixing bug 407211 will be a long and hard process, but I think I’ll be able to handle it.
morgamic 
Oh, I get it, very clever! Handle, long, hard, BeOS… 😀
Yeah ok, do _not_ Google for ‘penis’. IT’S NOT A REAL OS PEOPLE!!!1.34
Aside from the lack of a “vagina” operating system, the obvious burning question that remains is why does it not act in a case-insensitive manner? (e.g. merging WINNT and winnt, or Linux and linux).
LOL
heheh the only OS where you don’t mind a bit of extra bloat..
@Ian – fligtar just parsed the logs real quick — extension updates are case-insensitive though.