JavaScript librariesBrowser fingerprinting
FingerprintJS is a browser fingerprinting library that queries browser attributes and computes a hashed visitor identifier from them

CDN
Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services

Ecommerce
The World Wide Web Consortium W3C develops standards and guidelines to help everyone build a web based on the principles of accessibility internationalization privacy and security