Firefox 4 beta for mobile is now available for download on Android & Maemo. Firefox on mobile is a far more important development than first obvious cause Firefox brings with it a culture & a developer base for building third party addons & extensions. These extensions are certain to benefit the mobile platforms that support the Firefox browser and also could lead to a shift in mobile application development from platform specific apps to browser addons.
Microsoft has released Internet Explorer 8 which claims to be easier, faster and secure. Along with the release of IE 8, Microsoft has also released a white paper that would make good reading for developers and testing professionals.