Here are the few links that I got that helps you in testing your browser. (check the results for your browser too).
- sunspider executes a set of java script tests and allows you to again compare it with any of your another browser.
- http://mozilla.pettay.fi/xhr_upload/xhr_upload_demo.html – this will basically let you test XMLhttprequests.
- acid tests – for testing the animation.