Firefox 4, the new browser from non-profit developer Mozilla, has been downloaded by well over 5-million users since its launch yesterday in the US (5,3-million at time of going to press). The browser was downloaded 1-million times in the frst three hours that it was available

This is compared to the 3-million downloads that Microsoft's Internet Explorer notched up in the first 24 hours after its lauch last week.
Firefox 4 is the newest version of the popular, free and open source Web browser. Firefox puts users in control of their Web experience, providing a streamlined user interface, fun new features, a boost in speed and support for modern Web technologies.
Firefox 4 is available to download for Windows, Mac OS X and Linux in more than 80 languages. It will also be available on Android and Maemo devices soon.
Mozilla touts Firefox 4 as the fastest Firefox yet, with dramatic speed and performance advancements across the board making it Firefox is between two and six times faster than previous releases.
The latest version introduces a sleek new look that lets Web content take center stage. With features like App Tabs and Panorama, Firefox makes it easier and more efficient to navigate the Web.
In addition, Firefox delivers privacy and security features like Do Not Track and Content Security Policy to give users control over their personal data and protect them online.
Firefox Sync gives users access to their Awesome Bar history, bookmarks, open tabs and passwords across computers and mobile devices. Firefox also offers hundreds of thousands of add-ons, extensions and Personas and a new Firefox Add-ons Manager to make it easy for users to manage and discover add-ons to customise their Web experience.
Firefox supports modern Web technologies, including HTML5.