The browser war is heating up once again. Just few days after Microsoft set loose their Internet Explorer 9 (Download IE9 Final Standalone Offline Installer), rival Mozilla announced and released the final RTM version of next generation Firefox 4 web browser, which is now available for download for Windows, Mac OS X and Linux operating systems.

Firefox 4 is be one of the most awaited releases of Firefox browser from Mozilla. It takes nine months before the final version is released, with over 12 Beta builds, 2 RC build released in past. With a redesigned user interface for all platforms that’s sleeker and easier to use, Firefox 4 also vastly improved the performance and page rendering speed with Gecko 2.0 engine and brand new JägerMonkey JavaScript engine. In addition, FireFox 4 also comes with many new features such as App Tabs, Firefox Sync, GPU hardware acceleration, and much more.

Download Firefox 4 Final RTM [Official Direct Download Links] for Windows, Mac, Linux

Watch this video to see what’s new in Firefox 4:

Firefox 4 final RTM official direct download links: (English-US)

Download Firefox 4 final for Windows: Firefox Setup 4.0.exe

Download Firefox 4 final for Mac: Firefox 4.0.dmg

Download Firefox 4 final for Linux: firefox-4.0.tar.bz2

Download Firefox 4 Portable Version

Updated: Mozilla has Officially announced the release of Firefox 4 Final. Firefox 4 in 80 languages is available through firefox.com

Firefox 4 final version isn’t yet to be released publicly, though the developers Mozilla recently ensured that Firefox 4 final is to release on March 22nd, 2011 (tomorrow). After official release, Firefox 4 in 80 languages is available through firefox.com.