stupid computer question...

When I go into my task manager, why are there so many processes of my browser running at the same time, even though I only have one or two open? Happens with whichever browser I use. Seems like that's using excess memory. Is there a way to stop it? Or do I want to stop it?
Isn't any computer question you ask going to be stupid....!?... Touche..:poke:..