Puter compiles Firefox to WebAssembly
Puter has compiled the entire Firefox browser—including the Gecko layout engine, the full user interface, and the Spidermonkey JavaScript engine—to run inside a browser canvas element using WebAssembly. This experimental setup features end-to-end encryption using the WISP protocol for TCP-over-websockets and introduces a novel WASM-to-JS JIT for experimental site speedups. Although it was created primarily as a boundary-pushing experiment that consumed over 25,000 developer tokens for debugging, it showcases the immense potential of running full-scale desktop applications inside WebAssembly.
Compiling an entire modern browser to WASM is a stunning technical milestone, but it is currently more of a CPU-and-RAM-melting proof-of-concept than a practical daily driver.
- –Extreme Portability: Proves that even the most complex legacy C++ codebases like Gecko can run fully client-side on the web.
- –Performance Trade-offs: Emulating a browser JIT inside another browser is highly resource-intensive, though the custom WASM-to-JS JIT is an intriguing optimization effort.
- –Networking Workaround: Relying on WISP (TCP-over-websockets) highlights the ongoing need for native TCP/UDP socket standards in WebAssembly environments.
DISCOVERED
2h ago
2026-07-16
PUBLISHED
5h ago
2026-07-15
RELEVANCE
AUTHOR
coolelectronics