Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Django is a Python-based free and open-source web application framework.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Modernizr is a JavaScript library that detects the features available in a user's browser.
Polyfill is a service which accepts a request for a set of browser features and returns only the polyfills that are needed by the requesting browser.
Unpkg is a content delivery network for everything on npm.