← FeedShow HN: Firefox in WebAssemblyrss:hn · Jul 15, 2026 · sourceThis is the entire Firefox browser rendering to a element. Gecko, all UI components, and the Spidermonkey JS engine are all compiled and running in WebAssembly.Here are a few things you might find interesting:- This is fully end to end encrypted! We use the WISP protocol for TCP-over-websockets.- There is a novel WASM->JS JIT for experimental site speedup- This port cost over 25k in opus/fable tokens for debugging and JIT researchThis was just a fun experiment to push the boundaries of WebAssembly. For a more usable "browser in browser" experience, we also built https://github.com/HeyPuter/browser.js that eats a bit less RAM. Comments URL: https://news.ycombinator.com/item?id=48926939 Points: 11 # Comments: 5