Firefox Retires asm.js: The End of a 13-Year Performance Innovation

asm.js was a groundbreaking 2013 technology that proved web code could run at near-native speeds, directly enabling the eventual development of WebAssembly. With WebAssembly now the clear successor and asm.js usage largely migrated, Firefox's planned deprecation marks the natural evolution of web standards. For developers still using asm.js, transitioning to WebAssembly offers superior performance and smaller binaries, making it the pragmatic path forward.