Google has released Sputnik, a suite of 5000 tests that touch all aspects of the JavaScript language as defined in the ECMA-262 standard. It was created to check if V8, Google’s open source JavaScript engine conformed to the spec and to detect unexpected changes in behavior.

Mozilla has announced the beta release of Firefox Mobile Browser, code named Fennec. Amongst the highlights of this release is the inclusion of  TraceMonkey, Mozilla’s new JavaScript engine, which is said to greatly improve browser performance.