Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Coinbase Commerce is a platform that enables merchants to accept cryptocurrency payments.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Priority Hints exposes a mechanism for developers to signal a relative priority for browsers to consider when fetching resources.
Vercel is a cloud platform for static frontends and serverless functions.