Check out my friends angelfire site:
http://www.angelfire.com/indie/flaweddesigns/

Whenever we goto it, on IE and Firefox, it keeps forwarding to contentpage.html, which is the SRC for an iframe on the index page. Whenever I disable Javascript in Firefox, it no longer does that. But I also don't see any of Angelfire's Javascript that could be causing this..

Does anyone see the problem?

Well what it's doing is forwarding it to the name of the iFrame, such as "content" or whatever you have it set to.

To fix it just change the target="nameOfiframe" to target="blank"

-Auman