
The release of Firefox 3.5 came as the open source browser is proving an increasingly formidable challenger to Microsoft's Internet Explorer 8. In June, Firefox has a 22.5 percent market share according to web metrics company Net Applications, behind Internet Explorer's 65.5 percent. Though Internet Explorer's share has been declining for some time, the slide has accelerated over the last year since Firefox released version 3.0.
Here’s looking into the eight new features in Firefox 3.5.
Super speed

Open video and audio

Web developers can use these technologies to design pages that interact with video content in different ways, offering richer interactive experience beyond controlling playback and volume.
With a new management function in place, Firefox keeps memory usage under control. The XPCOM cycle collector continuously cleans up unused memory.
Forget This Site

The Forget this Site feature can remove every trace of a site from the user’s browser. To remove all private data or activity of the past few hours, a user needs to click on Clear Recent History, another Firefox-only feature that gives him full control over what stays and what goes.
Location Aware Browsing

Also, Firefox assures that it doesn’t share users' location without their permission.
Downloadable fonts

Easy web site organisation

Users can read feeds using an online Web service, a client-side feed reader or by creating a Firefox Live Bookmark. So there’s no need to comb the Web for the latest news and updates.
Over 6,000 add-ons

There’s no need to open a new window or a tab for each task. If a user is not sure where to begin, he can try Fashion Your Firefox which is a handy Web application that recommends add-ons based on his interests.
Also, restart the browser without losing your place after you install an add-on or software update. And, if Firefox or your computer unexpectedly closes, you don’t have to spend time recovering data or retracing your steps through the Web. If you’re in the middle of typing an email, you’ll pick up where you left off, even down to the last word you typed.
Gets new Indian language
Firefox 3.5 has added support for more Indian languages than its last major release. The browser, which supports all three major operating systems Windows, Mac OS X and Linux, is now available in eight Indian languages, up one from Firefox 3.
The new addition is Assamese. Firefox 3.0 supports Bengali, Gujarati, Hindi, Kannada, Marathi, Punjabi and Telugu. Other Indian languages that are likely to be included in future upgrades of the browser are Malayalam, Oriya and Tamil.
Firefox has fully localised versions in 63 languages with an additional 11 language versions still in beta.
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