[gentoo-user] Firefox 3.5 without changing entire system to ~arch?

[Marcus Wanner]

Could anyone tell me how to install firefox 3.5.x without changing the 
entire installation to ~arch? I have been looking around on the web for 
how to do this, but can't find anything that doesn't require being 
(afaict) very invasive to the rest of the system. Thanks!

Marcus
P.S. Mozilla considers this version to be stable/mature and is pushing 
out it as the version most people should use. Why hasn't it been marked 
as stable in the portage tree yet?