User blog comment:GuacamoleCCXR/The wonders of Google Chrome/@comment-25418284-20120114230509

You can do this easily with any browser, if you insert JavaScript into the page. However, it's easiest with something like Chrome's Developer Tools and Firefox's Firebug.

At any rate, it's fun to mess around like this and add Flash games, edit other people's posts, change avatars and stuff, etc.