Have you ever come across a beautifully designed website and wished you had X-ray vision to see how all those HTML elements on the site work? Have you ever wanted to see how a certain design might look on your site without actually changing the underlying code? Well, you don’t have to wish or think anymore because a powerful and really useful browser extension called Firebug can help you do all that. Any designer or developer looking to experiment with different styles on a website in real-time needs...