Internet Explorer 9

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CPU architecture	x86, x64
Release date	2011-03-14
Released for	Windows Vista, Windows 7, Windows Server 2008, Windows Server 2008 R2
Support end	2020-01-14
Other versions
Previous: Internet Explorer 8	Next: Internet Explorer 10

Internet Explorer 9 is the ninth version of the Internet Explorer web browser developed by Microsoft, and was released on March 14, 2011 for Windows Vista (SP2 with Platform Update), Windows Server 2008 (SP2 with Platform Update), Windows 7, and Windows Server 2008 R2. The first Platform Preview (7745.6019) was released on March 16, 2010.

Internet Explorer 9 is the first version of the browser since Internet Explorer 2 not to be bundled with an operating system. Windows 8 did not ship with IE 9, but was bundled with Internet Explorer 10 instead.

System requirements (minimum)

Minimum system requirements are a 1 GHz processor, 512 MB of RAM, and 70-200 MB (depending on the operating system installed) of hard drive space.

Release History

	Version	Release	ACID 3	Notable changes
Platform Preview 1	1.9.7745.6019	2010-03-16	55/100	Support for CSS3 and SVG, new JavaScript engine Chakra
Platform Preview 2	1.9.7766.6000	2010-05-05	68/100	Inproved JavaScript performance
Platform Preview 3	1.9.7874.6000	2010-06-23	83/100	HTML5: audio, video, canvas tags, WOFF
Platform Preview 4	1.9.7916.6000	2010-08-04	100/100	JavaScript engine as core component
Platform Preview 5	1.9.7930.16406	2010-09-15	100/100	New icon
Public Beta	9.0.7930.16406	(?)	100/100	Heavy UI modifications
Platform Preview 6	1.9.8006.6000	2010-10-28	100/100	CSS3 2D transforms, HTML5 semantic tags
Platform Preview 7	1.9.8023.6000	2010-11-17	100/100	Improved JavaScript performance
Platform Preview 8	1.9.8080.16413	2011-02-10	100/100	Improved general performance and interop, user location tracking
Release Candidate	9.0.8080.16413	2010-11-17	100/100	Improved general performance, slight UI changes, improved standard compliancy, tab rows
Final release	9.0.8112.16421	2011-03-14	100/100	Improved general performance and Tracking Protection, improved pinning

Notes

1. For Acid3 scores that are listed as 100/100, note that IE9 had an initial score of 95/100 but with a test update on September 2011, the scores got increased to 100/100 by omitting some unnecessary requirements.
2. IE9 passes both the Acid2 and Acid tests.
3. Internet Explorer 9 has a HTML5 score of 128 points, compared with IE10's 335 and IE8's 43.

Features

1. The UI was redesigned to give a more cleaner look and occupy less space.
2. Performance improvements, including hardware acceleration.
3. Security was further improved with the inclusion of application reputation.
4. (For Windows 7) Webpages can now be pinned to the taskbar. When clicked, the back/forward button changes its colours to match the colour of the logo of the website and there is no Home button.
5. Standards compliance was greatly improved, with IE9 the first version of IE to pass the Acid3 test as of September 2011.
6. Download manager was introduced along with the ability to pause, resume or cancel downloads. This feature was previously found in Internet Explorer 6 in some Longhorn builds.
7. Add on Manager was improved, now telling how many seconds each addon would take extra for each page to load. An automatic popup will appear on the bottom if it is more than the threshold(which can be set by the user).
8. The New Tabs (about:tabs) now display the recently visited sites.

Mobile IE9

A version of IE9 designed for mobile devices was introduced for Windows Phone 7.

Gallery

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