SpiderMonkey is an open-source JavaScript and WebAssembly engine by the Mozilla Foundation.[4] The engine powers the Firefox web browser and has used multiple generations of JavaScript just-in-time (JIT) compilers, including TraceMonkey, JägerMonkey, IonMonkey, and the current WarpMonkey. It is the first JavaScript engine, written by Brendan Eich at Netscape Communications, and later released as o
