cagraham writes: Facebook has teamed up with payment processors PayPal, Braintree, and Stripe, in an attempt to simplify mobile payments. The system allows Facebook members (who have turned over their credit and billing info) to click a "Autofill with Facebook" button when checking-out on a mobile app. Facebook will then verify the details, and securely transfer a user's info over to the payment processing company. The move is likely aimed at gathering more data on user behavior, which can be used to increase the prices Facebook charges for mobile ads. Whether or not the feature takes off however, will depend almost entirely on how willing users are to trust Facebook with their credit card data.