Joe Hewitt is a Mozilla developer who has written software dear to the heart of all web developers, including the original Mozilla DOM Inspector.
Joe’s newest Mozilla tool is Firebug, an integral logging and debugging extension for Firefox that sets a new standard for its category. Joe provided a power-user tour while announcing Firebug 1.0’s release on January 25, 2007, at Yahoo!.
Incidently, if you are doing Web development and you don’t yet have Firebug… get it!