I updated or upgraded Firefox to version 6, then I noticed that firefox has started locking down every 5 to 10 minutes, What happens is it get unresponsive then the blue busy icon starts spinning for several minutes, if I click the mouse button the screen goes light white and not responding is at the top. I have check to see if all the plug ins are up to date and they are. I have disabled the addons and its still doing it. Its like something is running every few minutes and locking everything down.