As it happens with almost every release of Firefox, you can download the latest version of your favorite browser i.e Firefox 9  one day ahead of the official release of the browser by Mozilla. The major change which comes along with this version of Firefox is in terms of increase in performance of JavaScript due to addition of type inference to the JavaScript engine which helps improve the performance by over 20-30 % as reported by Extremetech.

You wont notice any changes in the user interface or in fact any other visible changes. This new version also comes with lots of  bug and stability fixes, and overall speed increase. If you are a Mac user, then Firefox 9 lets you use “two finger swipe navigation”. This new version comes with the following major changes:

  • 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

For more details about all the changes that comes with this new version, refer the full release notes.

Download Firefox 9 now (Windows / Mac / Linux)