When i try to connect to Facebook with Firefox, Facebook tells me to Verificate my account with my cardnumber and also my adress, it tells me that We detected some unusually behavior in your account, for your security in order to can access your account please send us all requried informations, the credit card number must be yours or a member of your family. We won't save the credit card in our datebase and won't make any charges. We ask only for verification purpose. Why is this? Facebook works with every other browser and on other computers and i dont have trojan.