Firefox problem.

A while back I installed the latest version of Firefox, and since then it won't load certain things, I can't tell if its flash, or java or something else.

For example: on a website like http://xbox360.ign.com/ the front of the website has a window with news that you can scroll through, and it does not load on Firefox, but it works just fine on IE which I hate to use.

Any help is appreciated.

Ignus