It took a year to ship WebAssembly in Anubis

Anubis protects servers by requiring visitors to solve a Hashcash-style proof-of-work challenge, which adds negligible load for individual users but becomes costly for large-scale scrapers. The system aims to buy time for more precise fingerprinting methods, such as detecting headless browsers through font-rendering behavior, and it relies on modern JavaScript features that block-ing extensions like JShelter must be disabled.