TUTORIALS

Firebug integrates with Firefox to put a wealth of web development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page. Firebug is always just a keystroke away, but it never gets in your way। You can open Firebug in a separate window, or as a bar at the bottom of your browser। Firebug also gives you fine-grained control over which websites you want to enable it for.


https://addons.mozilla.org/en-US/firefox/addon/1843