Purpose: Will help to inspect elements, edit web pages and capture xPaths.
Step 1: Visit http://getfirebug.com/ and click on â€œInstall Firebug for Firefoxâ€
Step 1.1: You may be asked to choose your FireFox version. Ideally at the moment FB 1.7.3 should be ideal. This will also work FF 4 series.
Step 1.2: If you see this screen, click on firebug-1.7.3.xpi and click Allow button if it pops-up.
Step 3: Complete installation and re-start FireFox
Step 4: You will a small bug icon on the bottom right side of your FF browser.
Step 5: Watch a demo video on Firebug here http://getfirebug.com/video/Intro2FB.htm