Firebug is a free web development tool.
In this tutorial we are going to discuss following -
You can download and install Firebug from https://addons.mozilla.org/en-US/firefox/addon/1843/.
After visiting the page referenced above, click on the Download button, it shows a window to and click on the Install button there. It takes a while and asks you to restart the Firefox browser. Once rebooted, click on Firebug under Firefox(top left corner of your Firefox browser) > Web developer.
At this stage firebug is not activated. If you click that icon, Firebug will get activated.
1 - Minimize Firebug.
2 - Attach Firebug to the browser window.
3 - Deactivate Firebug for this site.