Firebug is a Firefox plugin for web developers. It allows you to explore web pages providing you with all of the information you need to understand what’s going on and to troubleshoot problems.

With Firebug you can easily inspect different elements of a webpage, including HTML, CSS and JavaScript and troubleshoot any problems you might be having with a page. Firebug will also alert you about any possible errors on a given page.

The cool thing about Firebug is that you can manipulate the properties on the page without making the actual changes to the code. So if you would like to see what your page would look like with a few modifications — and without actually disturbing the site and making the changes, you can do it in Firebug and get a live preview of your changes.

But this is just the beginning… Firebug offers much, much more.

Overall, I think Firebug is a must-have learning tool for web development beginners (like me) and with all of the advanced options I’m sure it’s also a great tool for experienced developers as well.