You cannot log in to Amazon directly with Purple Bird Browser because Amazon's official website only supports a few mainstream browsers such as Chrome, Firefox, Safari, Edge, etc., and Purple Bird Browser is not in the support list. If you must log in to Amazon with Purple Bird Browser, you can try to use the user agent switching plug-in to disguise Purple Bird Browser as one of the common mainstream browsers and then try to log in. It should be noted that using an unofficial supported browser to log in to Amazon may be risky and may not work properly with certain features. It is recommended to log in with an officially supported browser.