Get firefox 3 release candidate
http://www.mozilla.com/en-US/firefox/all-rc.html

Tab mix plus, Developer Build for firefox 3
http://tmp.garyr.net/tab_mix_plus-dev-build.xpi

Make a firefox video and win Prizes (see rules)
http://www.spreadfirefox.com/screencastcontest

Another firefox 3 screencast
http://people.mozilla.com/~beltzner/overview-of-firefox3.swf

You can install firefox 3 to a new directory and use firefox 2 as well.

I had gone over the downloads part but that clip got deleted apparently.

Also, out of a random update, I massively upgraded my old crappy role play site:
http://www.eliteskills.com/rp/roleplay.php

Full URL?