Firebug is an add-on for Firefox that provides access to browser internals. It features live editing of HTML and CSS, a DOM viewer, and a JavaScript debugger. Web application security testers appreciate the ability to see what's happening behind the scenes of the browser.
For downloads and more information,
visit the Firebug homepage.
Very useful, mostly for web developers though. Its real-time editing capabilities can come at handy on websites relying on the browser as a trusted client.
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Greate firefox addon. worth to install and on all firefox browsers.
useful for designers, developers and hackers, thanks
Agreed Duck, it's a webpage troubleshooting must have. It's awesome having a pages source in the same browser as the page.
This is an awesome tool for finding errors in sites. I use it all the time for troubleshooting.
Very useful, mostly for web developers though. Its real-time editing capabilities can come at handy on websites relying on the browser as a trusted client.