Step 1: Find a popular site (such as the BBC's homepage) and let the page load
Step 2: Paste the following into your browser:
javascript:document.body.contentEditable='true'; document.designMode='on'; void 0
Step 3: Edit the page as you see fit
Step 4: Re-enter the original URL (but don't submit it)
Now let the victim read the page. . . . . .
