The Firebug extension for Mozilla Firefox allows the debugging, editing, and monitoring of any website's CSS, HTML, DOM, and JavaScript, and provides other Web development tools. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page. Firebug is free and open source (BSD).

I've used it to make-over my original blogger template Typoork to a grand-looking Technorax template.


Get firebug now!