Mine works fine in Firefox. I would suggest trying to clear you cache by clicking on Tools ---> Clear Private Data. Get rid of it all and It might work.
Also check that you don't have num-lock or Caps lock on...
I have FireFox 3 and it doesn't save my account as logged in when I go to armorgames. Once I start typing T, it shows TotalReview so I click that and then it shows my name and password. I click log in and it logs in. Sounds complicated but it's not.
Well I don't have FF so I don't know but just when you log in and you type your name erase the black circles in the Password box,then type your password then you should get in.
it works now i was using stelther its a privacy program witch disallows u to use passwords i deactivated it now it works thank u guys 4 trying 2 help me