Firefox browser ported to WebAssembly, runs inside another browser

Developers compiled the full Firefox browser, including Gecko and SpiderMonkey, to WebAssembly, rendering it inside an HTML canvas. The port uses a novel WASM-to-JS JIT for speed and WISP protocol for end-to-end encrypted TCP-over-websockets. The project cost over $25,000 in debugging tokens and is described as a fun experiment to push WebAssembly boundaries.