If you do not already have an up to date version of Firefox installed, please do so now. After you have installed Firefox, set up Firebug by following these steps:
Go to http://getfirebug.com.
Click on the Install Firebug for Firefox button. Once you click this, you should see a message similar to this:
Click Install, wait for it to finish installing, and then restart Firefox.
Now that Firebug is installed, you should see a Firebug icon on the bottom right side of your screen.
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When Firebug is not enabled, the Firebug Icon is gray. When it is in enabled, it has an orange color—this is just a quick way for you to tell if Firebug is enabled or not for the current page you're on.
When you click on the Firebug icon (near the bottom right of your browser's window), Firebug will open and you can start using it. But before we start, let's take a look at what Firebug looks like after initially installing it and clicking on the Firebug icon:
The...