Firefox 3.1 will include a native JSON parser that can be used by Web applications instead of eval. Preliminary testing has indicated that the native JSON parser in Firefox delivers significant performance gains. This feature could soon be broadly used by Web application developers because Microsoft intends to include its own fully compatible implementation in Internet Explorer 8.Another impressive feature that Web application developers will be able to take advantage of in Firefox 3.1 is support for worker threads, which provide support for concurrent execution in JavaScript. Worker threads will make it possible to perform complex computations in the background, so that the browser and Web application don't hang or become unresponsive.The HTML 5 video element will also arrive in Firefox 3.1. This will allow video content to be embedded directly in Web pages, controlled with JavaScript, and manipulated through the DOM. It's a major step forward for rich media content on the Web. Firefox 3.1 will ship with built-in support for the Ogg Vorbis and Theora formats—open audio and video codecs that are believed to be unencumbered by patents. The actual codec implementations are integrated directly into the browser itself, so content in those formats will be playable without requiring any external components or plugins.More at; http://arstechnica.com/open-source/news/2009/02/mozilla-demos-impressive-firefox-31-features-at-scale.ars

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EXPERIENCE IS NOT WHAT HAPPENS TO A MAN BUT IT IS WHAT A MAN DOES WITH WHAT HAPPENS TO HIM