I’ve used many web debugging tools.  But nothing as advanced as this.  You can right click on a page, and tear apart HTML and CSS in real time.  I only wish that I had this years ago! Inspect HTML and modify style and layout in real-time Use the most advanced JavaScript debugger available for any browser Accurately analyze network usage and performance Extend Firebug and add features to make Firebug even more powerful Get the information you need to get it done with Firebug. Firebug. Read More