Mozilla is using tracing optimization techniques and Adobe's open source nanojit to increase the execution speed of SpiderMonkey, the JavaScript runtime engine in the Firefox web browser.

Mozilla’s last previous major JavaScript engine upgrade was TraceMonkey, which gave Firefox 3.5 a big speed boost. Since then, however, “the Web has grown more complex, with more and more ...

Mozilla already incorporated tracing optimization into Tamarin, a next-generation JavaScript runtime engine that leverages Adobe's ActionScript virtual machine. Tamarin, however, still lacks ...

Trying to keep competitive when running Web-based software, Mozilla is working to speed up its engine for running JavaScript software. Expect it in early 2013.

Mozilla claims that the Javascript engine will also benefit mobile developers, confirming that it is working with studios including EA, Disney and ZeptoLab to help them improve their mobile games.

That just won’t do for Firefox, says Mozilla, which wants to bring over its own code, like the new IonMonkey engine found in the desktop and Android versions of Firefox.

Mozilla on Wednesday patched a single critical security vulnerability in the JavaScript engine of Firefox, updating the open-source browser to Version 2.0.0.14.