SpiderMonkey (JavaScript Engine)
SpiderMonkey is the code name for the first-ever JavaScript engine, written by Brendan Eich at Netscape Communications, later released as open source and now maintained by the Mozilla Foundation. SpiderMonkey currently provides JavaScript support for Mozilla Firefox and various embeddings such as the GNOME 3 desktop.
Read more about SpiderMonkey (JavaScript Engine): History, Standards, Internals, Use