System and method for providing multiple payment method options to browser

A non-transitory computer-readable storage device storing instructions which, when executed by a processor, cause the processor to perform operations comprising:

• determining, at a site, whether a browser operating on a user device is one of a first browser type or a second browser type and whether a user can make a purchase using a first account or a second account, to yield a determination;
• when the determination indicates that the browser is the first browser type or that the user can make the purchase using the first account:
• presenting a first buy button which is associated with the first account;
• transmitting, from the site, to the browser and via a browser application programming interface that defines a protocol for communicating information about purchases between the site and the browser, a payment request having first information associated with the purchase from the site for the user;
• and
• receiving, from the browser, and via the browser application programming interface, first data associated with the first account;
• when the determination indicates that the browser is the second browser type or whether the user can make the purchase using the second account:
• presenting a second buy button which is associated with the second account;
• and
• receiving, from an on-line payment service at which the second account is registered, second data associated with the second account.

A system comprising:

• a processor;
• and
• a computer-readable storage device storing instructions which, when executed by the processor, cause the processor to perform operations comprising:
• determining, at a site, whether a browser operating on a user device is one of a first browser type or a second browser type and whether a user can make a purchase using a first account or a second account, to yield a determination;
• when the determination indicates that the browser is the first browser type or that the user can make the purchase using the first account:
• presenting a first buy button which is associated with the first account;
• transmitting, from the site, to the first browser and via a browser application programming interface that defines a protocol for communicating information about purchases between the site and the browser, a payment request having information associated with the purchase from the site for the user;
• and
• receiving, from the browser, and via the browser application programming interface, first data associated with the first account;
• when the determination indicates that the browser is the second browser type or whether the user can make the purchase using the second account:
• presenting a second buy button which is associated with the second account;
• and
• receiving, from an on-line payment service at which the second account is registered, second data associated with the second account.