Windows Internet Explorer 10 (abbreviated as IE10) is the next version of Internet Explorer currently being developed by Microsoft, and the successor to Internet Explorer 9. On April 12, 2011, Microsoft released the first "IE10 Platform Preview", which runs only on Windows 7 and later;[2][1] subsequent platform previews run on only Windows 8. The release, only four weeks after the final release of Internet Explorer 9, has been noted as a fast release cycle in the context of the new browser wars.[3] IE10 expands on Internet Explorer 9 functionality in regards to CSS 3 uptake, hardware acceleration,[4] and HTML5 support.

On Windows 8, it will be divided into two versions with different user interfaces: a new Metro app that will not support plug-ins, and a traditional desktop application that will retain plug-in support.[5] On 64-bit versions of Windows 8, the Metro version of IE10 will be the 64-bit version of the browser by default.[6]


Internet Explorer 10 was first announced on April 12, 2011 at the MIX 11 conference in Las Vegas.[7] In this conference, Microsoft showcased a demo version of Internet Explorer 10 along with a demo version of Windows 8.[8] On the same day, a Platform Preview of Internet Explorer 10 was released on the Microsoft Internet Explorer Test Drive website.[4] It only supports Windows 7; later platform previews only support Windows 8. The beta and release candidate will be available for Windows 7.[9]

Reviewers' responses to the release of Internet Explorer 10 Platform Preview were varied; however, they noted how soon (29 days) after the release of Internet Explorer 9 is Microsoft talking about the next version. While Don Reisinger of eWeek listed his requested features for the next version, Michael Muchmore of PC Magazine tested Platform Preview 1's performance and HTML5 support with both Microsoft's and third-parties' test suites. In his test, Platform Preview 1 performed better than Internet Explorer 9 but not always better than the competing web browsers.[10][11]

On September 13, 2011, Microsoft released Windows 8 Developer Preview to the general public, which came with Internet Explorer 10 Developer Preview (the first full browser incarnation of Internet Explorer 10).[12] Although Internet Explorer is the last major web browser – among Mozilla Firefox, Google Chrome, Opera, and Safari – to support spell checking, it is the first desktop browser to support auto-correct.[13][14][15][16]

On version ES5 of the ECMAScript standards conformance Test 262,[17] Internet Explorer 10 Consumer Preview scored 67/11563 (Tests To Run: 11563 | Total Tests Ran: 11563 | Pass: 11496 | Fail: 67 | Failed To Load: 0). Lower scores are better, as the figure represents the number of failed tests out of the total number of tests. This score of only 67 failed tests represented one of the best ECMAScript conformance score for all browsers on version ES5 of the test.[citation needed] Test 262 is still undergoing active development and is not yet complete. IE10 is also the first iteration of Internet Explorer to fully pass the Acid3 test.

Release history

Name Version[A] Release Date Works on New notable features
Internet Explorer 10 Platform Preview 10.1000.16394[B] Template:Dts[4] Windows 7 and later[2] Support for CSS3 multi-column layout, CSS3 grid layout, CSS3 flexible box layout, CSS3 gradients, and ES5 strict mode.
Internet Explorer 10 Platform Preview 2 10.1008.16421[C] Template:Dts[18][19] Windows 7 and later Support for Positioned Floats, CSS stylesheet limit lifted, CSSOM Floating Point Value support, Improved hit testing APIs, Media Query Listeners, HTML5: Support for async attribute on script elements, HTML5 Drag and Drop, HTML5 File API, HTML5 Sandbox, HTML5 Web Workers, and some Web Performance APIs.
Internet Explorer 10 Developer Preview[D] 10.0.8102.0 Template:Dts Windows 8 Developer Preview Support for Windows 8, CSS 3D Transforms, CSS Text shadow, SVG Filter Effects, Spellchecking, Autocorrection, local storage with IndexedDB and the HTML5 Application Cache, Web Sockets, HTML5 History, and InPrivate tabs.
Internet Explorer 10 Platform Preview 4 10.0.8103.0[E] Template:Dts[20] Windows 8 Developer Preview Cross-Origin Resource Sharing, File API Writer, JavaScript Typed Arrays (WebGL), CSS user select property, HTML5 Video Text Captioning, and Updated Quirks Mode.
Internet Explorer 10 Consumer Preview[21] 10.0.8250.0 Template:Dts Windows 8 Consumer Preview Cross-Origin Resource Sharing (CORS) for XMLHttpRequest, CSS -ms-user-select property, CSS3 font-feature-settings property to access advanced OpenType® features, Document setting to enable floating point values in CSS-OM, HTML5 BlobBuilder API and new APIs to save or open files, HTML5 track element for HTML5 video captions, Interoperable HTML5 Quirks mode, JavaScript Typed Arrays, Meta tag to alert user that site requires ActiveX add-ons available only in desktop IE10, removal of legacy graphics features from IE10 standards mode, changes to support latest HTML5 WebSocket API, and Web Worker thread pooling.[22]
A.^ Refers to the Internet Explorer (engine) version, not the Platform Preview version[23]:First screenshot
B.^ Platform Preview version is 2.10.1000.16394[24]
C.^ Platform Preview version is 2.10.1008.16421
D.^ This version is only included as part of Windows 8 Developer Preview, and is a full version rather than a usual Platform Preview.[12]
E.^ Platform Preview version is Does not replace Internet Explorer Developer Preview included in Windows 8.[20] This Platform Preview is compatible only with Windows Developer Preview.

User agent string

Internet Explorer 10 uses a new user agent string, which changes if the browser is using compatibility mode. The MSIE 9.0 token was changed to MSIE 10.0. The Trident/5.0 token was likewise changed to Trident/6.0.[25]

Operating system User Interface Using IE7
User agent string
Windows 7 Windows Aero/
Desktop UI
No Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0)
Yes Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/6.0)
Windows 8 No Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0)
Yes Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.2; Trident/6.0)
Metro UI No Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0)


  1. 1.0 1.1 Keizer, Gregg (2011-04-13). "Windows Vista: No IE10 for you". Computerworld. Computerworld Inc. Retrieved 2011-04-21. "When Vista users try to install the IE10 preview, they see a dialog box that reads, "Windows Internet Explorer Platform Preview does not support any operating system earlier than Windows 7," after which the installation process terminates." 
  2. 2.0 2.1 Muchmore, Michael (2011-04-15). "Internet Explorer 10 drops Vista support". PC Magazine. Ziff Davis, Inc.,2817,2383640,00.asp. Retrieved 2011-04-21. 
  3. Bertolucci, Jeff (2011-04-12). "Internet Explorer 10 Platform Preview: Check It Out". PC World (PCWorld Communications, Inc). Retrieved 2011-04-14. 
  4. 4.0 4.1 4.2 Hachamovitch, Dean (2011-04-12). "Native HTML5: First IE10 Platform Preview Available for Download". IE Blog. Microsoft Corporation. Retrieved 2011-04-14. 
  5. Metro Version of IE 10 Will Be "Plugin Free"
  6. Higman, Forbes (2012-03-13). "Enhanced Memory Protections in IE10". IE Blog. Microsoft Corporation. Retrieved 2012-03-13. 
  7. Hachamovitch, Dean (2011-04-12). MIX11 Day 1 Keynotes. Microsoft Corporation. Retrieved 2011-04-15. 
  8. Valich, Theo (2011-04-12). "Microsoft Runs Windows 8, Internet Explorer 10 on nVidia Tegra / ARM CPU". Bright Side Of News. Retrieved 2011-04-14. 
  9. "HTML5 for Applications: The Fourth IE10 Platform Preview". 2011-11-29. Retrieved 2011-11-30. 
  10. Muchmore, Michael (2011-04-13). "Internet Explorer 10 Platform Preview 1: Hands On". PC Magazine (Ziff Davis, Inc).,2817,2383482,00.asp. Retrieved 2011-04-14. 
  11. Reisinger, Don (2011-04-13). "Microsoft Internet Explorer 10 Design: 10 Essential Features". eWeek (Ziff Davis Enterprise Holdings Inc). Retrieved 2011-04-14. 
  12. 12.0 12.1 Hachamovitch, Dean (13 September 2011). "Windows Developer Preview: The Third IE10 Platform Preview". IEBlog. MSDN Blogs. Retrieved 2 December 2011. 
  13. Leithead, Travis (8 November 2011). "Typing with Speed and Accuracy in IE10". IEBlog. MSDN Blogs (Microsoft Corporation). Retrieved 2012-01-02. "Spellchecking is an IE10 feature; while it is seamlessly integrated into Windows 8, we want to ensure that all users of IE10 benefit from this feature, including our users of IE10 on Windows 7." 
  14. Foley, Mary Jo (8 November 2011). "Microsoft Internet Explorer 10 to add spell checking, auto-correct". ZDNet (CBS Interactive). Retrieved 2012-01-02. 
  15. Oiaga, Marius (2011-11-09). "Internet Explorer 10 (IE10) on Windows 8 Spellcheck and Auto-Correct". Softpedia. SoftNews SRL. Retrieved 2012-01-02. 
  16. Brinkmann, Martin (10 November 2011). "Spellchecking in Internet Explorer 10, Test It Now". Retrieved 2012-01-02. 
  17. "ECMAScript test262". EMCAScript. Retrieved September 14, 2011. 
  18. "Download details: Windows Internet Explorer Platform Preview". Microsoft Download Center. Microsoft Corporation. 29 June 2011. Retrieved 5 May 2011. 
  19. "iepreview.msi". Microsoft Download Center. Microsoft Corporation. 29 June 2011. Retrieved 17 November 2011. [dead link]
  20. 20.0 20.1 Mauceri, Rob. "HTML5 for Applications: The Fourth IE10 Platform Preview". IEBlog. MSDN Blogs (Microsoft Corporation). Retrieved 2011-11-29. 
  21. Welcome to Windows 8 – The Consumer Preview - Building Windows 8 - Site Home - MSDN Blogs
  22. "Web Platform Features in Windows Consumer Preview". IEBlog. 2012-03-02. Retrieved 2012-03-03. 
  23. "Internet Explorer 10 Platform Preview 2.10.1000.16394". Softonic International. Retrieved 17 November 2011. 
  24. Wilson, Mark (12 April 11). "Internet Explorer 10 Platform Preview 2". PC Advisor. IDG. Retrieved 17 November 2011. 
  25. "The IE10 User-Agent String". IE Blog. Microsoft Corporation. 2011-04-12. Retrieved 2011-04-15. 

See also

Windows 8

External links

Template:Web browsers

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