I have Firefox open, with just one tab and it's using more memory than the other 19 programs I have running put together. These include anti-virus, anti-spyware, BYOND, dreammaker, photoshop cs2, utorrent, then some background processes. Firefox is an insane resource guzzler for me.
Are you shitting me? Firefox with one tab open uses more memory than photoshop cs2?
I think you mean JavaScript heavy.