go into the setting and click on history. click on clear recent history. then select cookies, cache, and download history and delete. if that does not work, try disabling any toolbars and addons you have installed to see if one of them is causing the problem.
I tried logging into Cnet with Firefox about 3 weeks ago because I needed help with something. But, when I clicked on the log in button, nothing happens. I can't even get to the log in dialog box where it asks for user name & password.
Well, just for the hell of it, tonight, I tried with IE. Actually, I didn't even have to log in. As soon as I got to the Cnet page, I was already logged in. I've read about someone else having this particular problem with Chrome. But, not FF. Can anyone explain this to me ?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic