no ignorance at all actually. If you actually now how to setup a machine, a simple router/or firewall, you'll be fine.
Firefox however can't even load images right on some of my fav sites so I always revert back to ie.
But, being a lan admin, I have to use both just to know them so I can support them. Firefox isn't what everyone makes it out to be. MAtter of fact, the majority of people I see pushing firefox are only using it because they "heard" it was safer or better then IE, and have no idea as to why.