Using this trick, you will be able to edit any webpage live in your
browser.You can edit Google or even Facebook for that matter right in
your browser and that too without requiring any technical know-how or
getting deep into hacking and cracking.
Here is an example picture demonstrating the Facebook Homepage
To use this trick, all you need to do is just copy the code given below
and paste it in your address bar after you have opened the website you
wish to edit. And start editing.
javascript:document.body.contentEditable%20=%20'true';%20document.designMode='on';%20void%200