Mozilla released the new version of Firefox already offered for download, although it is not yet on the frontpage of the browsermaker. Firefox 9 has a faster javascript engine and improvements for developers.
The in Firefox 9 is improved javascript engine needs to run javascript 20 to 30 percent faster happen. This is due to the support for type inference, which ensures that javascript code is analyzed before sending it to the javascript compiler is sent.
The compiler can do this analysis with fewer scenarios to consider. Type inference is supported in some programming languages with static characterizations, including, recently, also Visual Basic and C#, but is uncommon in dynamically typed languages like javascript.
By adding type inference for javascript, the performance of javascript in the direction of that of statically typed languages. Incidentally, will Perl 6 support for type inference. The javascript engine of Firefox ran in the last few years behind that of Chrome, but the new feature should lead to that catching up.
Furthermore, the support for html5 and css improved. So is the support for the css element text-overflow improved and has support for font-stretch added. Developers can in addition, the do not track status of a visitor via javascript request. Users can set the do not track-enable button to prevent websites from their behavior for the ads. To get the button to work, it is necessary that websites voluntarily cooperate.
Further, the integration with Mac OS X Lion improved. So the theme is better tailored on the newest OS X version, and can with two fingers geswiped. Finally, the stability of the browser has improved, claims Mozilla. The version can be downloaded for Windows, OS X, and Linux.