Mozilla Firefox 9 continues to show improvements and should make the browser between 20 and 30 percent faster, plus it uses less memory than previous releases. In addition to the new Javascript trick, which is called Type Inference, Mozilla Firefox 9 improves theme integration and swipe navigation . Type Inference is a feature of the SpiderMonkey JavaScript engine that integrates with the JaegerMonkey JIT compiler to provide analysis and help generate more efficient code. Mozilla Firefox 9 with Type Inference is up to 30% speedier on JavaScript benchmarks like Kraken and V8.

Mozilla Firefox 9

Mozilla Firefox 9

• Added Type Inference, significantly improving JavaScript performance
• Improved theme integration for Mac OS X Lion
• Added two finger swipe navigation for Mac OS X Lion
• Added support for querying Do Not Track status via JavaScript
• Added support for font-stretch
• Improved support for text-overflow
• Improved standards support for HTML5, MathML, and CSS
• Fixed several stability issues