Firebug integrates with Firefox to put a wealth of web development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page.” – description taken from http://getfirebug.com/.

A quick installation and review of how the tool works, and I was up and running. Using Firebug I was able to ‘Control – Click’ (on a MAC) anywhere on my web page and immediately see where in my style sheet the item I was pointing to is programmed.

Firebug also provides powerful javascript and network activity monitoring tools. It has been around for a few years, but for us, it is a recent find. Overall, it is the best web development tool I have found in quite some time – highly, highly recommended!Get Firebug, it’s free!