: It was the first version of IE to achieve a perfect or near-perfect score on the Acid3 test (reaching 100/100 after the test was revised) and introduced support for HTML5, CSS3, and SVG. System Requirements and Lifecycle
IE9 introduced several features that brought it closer to competitors like Chrome and Firefox: Internet Explorer 9 (32 bits)
: IE9 was compatible with Windows 7, Windows Vista SP2 , and their server counterparts. Notably, it was the first version of IE to not support Windows XP. : It was the first version of IE
: The 32-bit version featured the new "Chakra" JavaScript engine. It utilized a background thread for Just-In-Time (JIT) compilation , allowing users to interact with pages while the browser generated faster code in the background. Windows Vista SP2
