We have just released Aurora 9 (download and test Aurora 9), which is planned to be the upcoming Firefox 9. In it, we have a number of new things that we hope will get you excited! JavaScript Type Inference We’ve improved JavaScript performance once again with type inference. We’ve made significant improvements on both the V8 and Kraken benchmarks, and you should see real-world improvements to Jav
![Introducing Aurora 9 – Mozilla Hacks - the Web developer blog](https://cdn-ak-scissors.b.st-hatena.com/image/square/8f043099b608abf8384b24171faa177d3698e62e/height=288;version=1;width=512/https%3A%2F%2Fhacks.mozilla.org%2Fwp-content%2Fthemes%2FHax%2Fimg%2Fhacks-meta-image.jpg)