Deleting Billing Info

[indycalgary]

HELP ... i bought some stuff online using my VISA .. that info still comes up when i type in new info .... i want to remove that data(VISA number). I tried clearing the CACHE but its still there .
Can anyone tell me how to remove this data from my computer. XP running Firefox 3.5.

 

[number13]

are you sure it isn't FF

 

[indycalgary]

what is FF