If you’re having trouble downloading Mozilla Firefox 0.8 because everyone else is trying to do the same thing at the same time – I suggest you try their ftp server – seems to be running pretty smoothly at the moment.
ftp.mozilla.org
/pub/mozilla.org/firefox/releases/0.8/
The new firefox apparently has FTP built in. I found this article about it. firefox ftp http://www.ctunion.com/node/18