Puter

Firefox in WebAssembly: Running a Browser Inside a Browser

The Puter team compiled Firefox into WebAssembly, enabling a full browser to run inside another browser. The project spent about $25,000 on Claude Opus and Fable tokens, but due to the Claude Max subscription, costs were much lower. Traffic is proxied through Puter's servers via WebSocket (Wisp), which is necessary due to browser restrictions on network connections.

Anthropic