Mozilla has just released the developer version of Firefox 9, which will include a boost for JavaScript performance.


Scheduled for a December 20 release, Firefox 9 is now shipping as an Aurora release and includes, most importantly, support for type inference. This technology allows Firefox' JavaScript to sift through code more effectively and run JavaScript applications much faster as a result. Mozilla claims that Firefox 9 is about 44 percent faster than Firefox 8 in its own Kraken benchmark. Other new features include a JavaScript do-not-track API, as well as the integration of the new tablet touch UI.
The software can be downloaded from Mozilla's Firefox Releases channel.