I just saw that behavior on a system that signed up with Netscape dialup using their Hi-speed.
It uses a proxy server to compress the graphics, firefox wouldn't go to any pages, whereas IE worked OK.
I don't know why, it is just an observation.
Hey i'm using windows xp and i use the browser firefox . Here's the problem tho : I go to a few sites regularly and one of them it has just recently started saying that it refuses the connection to the site . Any ideas what is going on ?