I just realized that if I have form history enabled in Firefox it saves my credit card’s CSV code. It doesn’t do that for my credit card number. Is this a browser thing, or can you change your checkout pages so that the browser will not save this like the credit card number? It seems to me that the CSV code is just as important as the other values on the card. I believe forms on other sites do not save the CSV code. Now the solution is to simply turn off this feature, but it’s kind of useful to turn it off just for this one site. Thoughts?