Change browser settings: To continue using Amazon Pay without service interruption, be sure to allow third-party cookies in your browser’s settings. Your browser might refer to these as a privacy setting, preference, or option.
Cookies and How We Use Them
Cookies and Browser Settings
The Help menu on the menu bar of most browsers will tell you how to prevent your browser from accepting new cookies, how to have the browser notify you when you receive a new cookie, and how to disable cookies altogether. Additionally, you can disable or delete similar data used by browser add-ons, such as Flash cookies, by changing the add-on's settings, or visiting the website of its manufacturer.