John J. Barton, the creator of Firebug, announced he is going to work developing the next generation of web dev tools for Google.
In my opinion, Firebug is the best web development tool available in a browser today and has been one of the most invaluable tools for me. It allows a user to quickly inspect various elements of a web page, modify them and witness those changes in real time – all from within the browser. If you’re keeping score at home – Google Chrome +1, Firefox -1.