Installing Firebug
If you want to make a few quick web design tweaks to your WordPress theme, Firebug can help you do it. Firebug is a free add-on for Firefox that allows you make CSS changes in real-time and will help you locate the files where the CSS rules are defined and where in the file they are. In this tutorial we are going to show you how to make some basic customizations to our themes using Firebug.