Cloudflare Browser Insights is a tool that measures the performance of websites from the perspective of users.
Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.
Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.
Modernizr is a JavaScript library that detects the features available in a user's browser.