Selenium uses JavaScript to automate web pages. This lets it interact very tightly with web content, and was one of the first automation tools to support Ajax and other heavily dynamic pages. However, this also means Selenium runs inside the JavaScript sandbox. This means you need to run the Selenium-RC server to get around the same-origin policy, which can sometimes cause issues with browser setup.

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Hot Key for View Source in IE

ALT+V+C
F10+V+C
SIMPLE
TOGGLE FILE MENU WITH ALT KEY ,
V IS FOR VIEW
C IS FOR SOURCE

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NetApplications has just released its browser market share stats for the month of April, and there is something notable here: Internet Explorer has fallen to a “historic low” of 59.95 percent market share, losing about 0.69 points since last month. Google’s Chrome continues its assault on Safari, reaching a 6.73 percent share (while Safari nabbed 4.72). Of course, Internet Explorer is still so far ahead of the rest of the pack it’s hard to make these losses — however significiant — into a tragedy of epic proportions story for Microsoft, so we’re not going to do that. Keep in mind, as well, that NetApplications is not the only measurement of market share — and StatCounter, by comparison, currently estimates IE’s share at about 51.42 percent. Hit up the source link for the full battery of data.

In web based application we generally go to test the below mentioned things:
1. Usability testing
2. Security testing
3. Functional testing
4. Volume testing
5. Load Testing
6. Browser compatibility testing
7. Validation testing
8. Backend testing