Firebug controls
Firebug icon:
The Firebug icon on the top left contains various commands and options related to Firebug when you click on it.
Page Inspector icon: This icon, a cursor inside a rectangle, is the
HTML Inspector. When you click on it, your mouse cursor will identify HTML elements on the web page. So, when you mouse over anything on a website, the element will be outlined in blue and the HTML panel will open up and show you the element your mouse is over.
Panels
The next set of controls is called panels; each panel provides a different type of function. The panels act like tabs (the two terms can be used interchangeably), but Firebug refers to them as 'panels' in the documentation. Let's go over each panel, since they are, essentially, what makes up Firebug.
Console panel
Firebug's Console panel is where we'll spend most of our time. It acts as a powerful JavaScript command line, or interpreter, which means we can type in JavaScript code and execute it right away—no need to...
