Internet Explorer 9

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.

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.