Browser Hang Test
This demo shows how your browser responds to hangs.
The swimming fish indicates that the webpage is functioning properly. You can also type in the input text box below. Click any of the buttons below to hang the webpage. Once it's hung you will notice that the fish is no longer animating. Try interacting with the hung webpage. It will no longer respond to mouse clicks or keyboard events.
In IE9, a hang in the webpage no longer affects the rest of the browser. IE is able to isolate the problem to the specific tab so that other tabs and windows can continue to process input messages properly. While the webpage is hung you can switch to other tabs, open new tabs, move the browser window around or navigate to other websites.
Once the current webpage stays hung for more than 10 seconds, clicking on the hung webpage will trigger a notification, which allows you to recover the webpage and continue browsing. If you've entered text into the input box below, IE9 will recover the text along with the tab so that you won't lose the information.
WARNING: This demo may cause data loss in other tabs if you are using a browser that is not resilient to hangs.