[ Thanks to Ramsai
for this link. ]
“Firebug is a free, open source tool that is available
as a Mozilla Firefox extension, and allows debugging, editing, and
monitoring of any website’s CSS, HTML, DOM, and JavaScript. It also
allows performance analysis of a website. Furthermore, it has a
JavaScript console for logging errors and watching values. Firebug
has many other tools to enhance the productivity of today’s web
developer.“Firebug integrates with Firefox to put a wealth of development
tools at our fingertips while we browse a website. Firebug allows
us to understand and analyze the complex interactions that take
place between various elements of any web page when it is loaded by
a browser.“Firebug simply makes it easier to develop
websites/applications. It is one of the best web development
extensions for Firefox. Firebug provides all the tools that a web
developer needs to analyze, debug, and monitor JavaScript, CSS,
HTML, and AJAX. It also includes a debugger, error console, command
line, and a variety of useful inspectors.”