Internet Explorer 11 (IE11) is the eleventh and final version of the Internet Explorerweb browser by Microsoft. It was officially released on October 17, 2013 for Windows 8.1 and on November 7, 2013 for Windows 7. The browser was also shipped with Windows 10 on its release on July 29, 2015, but Microsoft Edge is the default browser in this version of Windows. It is the default browser shipped with Windows Server 2016 and Windows Server 2019. After January 12, 2016, only the most recent version of Internet Explorer to be offered for installation on any given Windows operating system will[needs update] continue to be supported with security updates, lasting until the end of the support lifecycle for that Windows operating system. On Windows 7 and 8.1, only Internet Explorer 11 will receive security updates for the remainder of those Windows versions' support lifecycles.[4]
While Internet Explorer 10 will reach end of support on January 31, 2020, IE 11 will be the only supported version of Internet Explorer on Windows Server 2012 and Windows Embedded 8 Standard. IE 11 will be available for piloting on Windows Server 2012 and Windows Embedded 8 Standard starting Spring of 2019.[5][6]
IE11 features redesigned developer tools,[7] support for WebGL,[8] enhanced scaling for high DPI screens,[9] prerender and prefetch.[10] After launch IE11 got support for HTTP/2.[11][12][13] In addition, IE11 supports Full Screen and Orientation APIs, CSS border image support, JavaScript enhancements, DOM mutation observers, Web Cryptography API, video text track support, encrypted media support and an improved HTML editor.[14] IE11 uses Transport Layer Security v1.2 as the default protocol for secure connections and deprecates RC4cipher suite.[15]
Internet Explorer 11 for Windows RT does not support Java and other add-ons.[16]
IE11 has deprecateddocument.all, meaning that code that checks for its presence will not detect it, but code that actually uses it will continue to work.[17] Additionally, the attachEvent proprietary API has been removed.[14]
In a November 2013 review by SitePoint, IE11 scored better than Google Chrome 30 and Firefox 26 in WebKit's SunSpider test and Google's WebGL test. It tied with Chrome for fastest in Microsoft's fish aquarium benchmark for WebGL and came last in Google's V8 performance benchmark. As a result of the speed improvements, the reviewer said "if you switched to Chrome for speed alone, you're now using the wrong browser." IE11 was also observed to use less memory with multiple tabs open than contemporary versions of Chrome and Firefox.[14]
In August 2015, SitePoint again benchmarked IE11 in its review for Microsoft Edge, where Edge 12, Chrome 44 and Firefox 39 were also present. IE11 came last in Apple's JetStream test (which replaced SunSpider) and Google's Octane test (which replaces V8) but it came second in Microsoft's fish aquarium test, after Edge.[23]
While there were no other releases of Internet Explorer, an update for Windows 7 and 8.1 was released on April 2, 2014 which added Enterprise Mode, improved developer tools, improved support for WebGL and ECMAScript 5.1.[37]