Firefox in WebAssembly

Simon Willison · 3 hours ago

Puter compiled Firefox to WebAssembly, enabling the browser to run inside another browser like Chrome. The project cost approximately $25,000 in Claude Opus and Fable API tokens and routes all traffic through WebSockets via Puter's servers to work around browser network restrictions. This allows Firefox to function as a fully nested application while maintaining end-to-end encryption for HTTPS traffic.