One of my favourite Firefox extensions has just released a new version. Firebug announced today that the 1.0 version is out now in beta, and even more importantly, has been released under the same open source license as Firefox itself. From the site: Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page.

Fancy-pants DOM features abound, and the usual AJAX debugging goodness is in there. Thanks go to Joe Hewitt.