X-Ray, another vision of HTML pages

X-Ray is a new firefox extension for developers which when applied to a page it can help you see how the document was constructed without having to go back and forth between the sourcecode and the page in your browser. The current list of supported tags is: h1, h2, h3, h4, h5, h6, p, ol, ul, li, dt, dd, font, div, span, blockquote, pre, a, b, i, strong, em. It might be confusing also if the page you are testing display some html tags ?