As we all know that Firebug is a great tool for debugging and profiling our Javascript code, but we have been limited to do it with Mozilla based browsers (Firefox). Firebug team has done great job by providing us ability to use Firebug Lite with Internet Explorer, Opera or Safari.
Firebug Lite is just a small javascript library which could enable us to use most of the features of Firebug Extension without any Installation..!

Firebug Lite is subset of Firebug that could be used in IE, Opera and Safari. Firebug Lite 1.2 is packed with XHR, DOM, HTML and Javascript debugging.

You can embed Firefox Lite into any web page / application to start debugging.

To embed Firefox Lite into any page just attach following code into your page.

<script type='text/javascript'
        src='http://getfirebug.com/releases/lite/1.2/firebug-lite-compressed.js'></script>

Or else you can download source file to your local system and can include into your pages. You can also drag-and-drop following link to your bookmark and it will enable Firebug Lite on any page.

Place Firebug Lite Bookmark

or

Go get Firebug Lite From Firebug Lite Home.

Just have a look at these screen-shots...
IE CSS ViewIE ConsoleOpera HtmlOpera XHRSafari ConsoleSafari DOMSafari Script