Internet Explorer 11 is available for Windows 7/8/Server versions and has been discontinued for the new Windows 10 web browser - Microsoft Edge. It includes new capabilities to improve real-world Web site performance, support for the well-defined and commonly used features of the emerging ECMAScript 6 standard, support for WebGL, and high quality, power efficient HTML5 video without plugins. It was officially released on 17 October 2013 for Windows 8.1 and on 7 November 2013 for Windows 7. Internet Explorer 11 (commonly abbreviated IE or MSIE) is a fast, fluid and secure web browser, developed by Microsoft which comes built-in with Windows OS.