Copy and paste the following Javascript code into your browser’s address/location bar, then hit enter.

javascript:document.body.contentEditable='true'; document.designMode='on'; void 0

Select portions of text you want to edit and start typing new things in.

This little tidbit works with IE7, Firefox and Safari browsers. It’s one of the methods scammers use to fake screenshots of Adsense earnings and Paypal transactions. It should be noted though, you’re not actually editing the web page itself but you’re editing the page as you see it on your screen.