Testing web based application is fun. At the same time it is headache too. Tester has to have huge checklist to test in that one is cross browser testing, which eat-up tester brain, developer end up writing different CSS for each browser, which has to test across the entire browser. It’s always good to keep an eye on browser stats.

Statistics are important information. From the statistics below, you can see that Internet Explorer is the most common browser. However, Firefox has become quite popular as well. Anyhow in future IE will disappear, because Firefox is very quickly eat-up IE market, sooner or later Firefox will be the top browser. Ok let be a side.

Now we will come to testing web application in multiple IE, Every time you install a newer version of Internet Explorer, Windows has a tendency to overwrite previous versions. Because each IE version has its own JavaScript engines. so there is a tool to test multiple IE it is called a s IETester. IETester is a free Web Browser that allows you to have the rendering and JavaScript engines of IE8 beta 1, IE7 IE 6 and IE5.5 on Vista and XP, as well as the installed IE in the same process.