 |  |  |  |  Firebug 1.5: Editing, Debugging, and Monitoring Web Pages
Firebug is a free and open source tool, available as a Mozilla Firefox extension, which allows debugging, editing, and monitoring of any website's CSS, HTML, DOM, XHR, and JavaScript. Firebug 1.0 beta was released in December 2006. Firebug usage has grown very quickly since then. Approximately 1.3 million users have Firebug installed as... |