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Firebug
A Firefox add-on that gives you development tools for Firefox while you're browsing the internet...
Firefinder for Firebug
A Firefox add-on that helps you find the HTML elements matching chosen CSS selector(s) or XPath expression...
CodeBurner for Firebug
A Firefox add-on that integrates with Firebug, to extend it with reference material for HTML and CSS....
Drupal For Firebug
A Firefox add-on that extends the Firebug module in order to provide specific debugging messages...
Rainbow for Firebug
A Firefox add-on that allows you to highlight JavaScript syntax for Firebug...
Firefox extension highlight JavaScript highlight syntax rainbow
Firebug for SongBird
A Songbird web development add-on...
Firebug Lite
A Google Chrome that lets you inspect the source code for any webpage...
Inline Code Finder for Firebug
A Firebug add-on that highlights the HTML elements...
Firebug Net Panel History Overlay
A Firefox add-on that adds history functionality to your firebug net panel...
Firefox extension panel functionality history functionality add panel
FirePHP
A Firefox add-on that helps you print your Firebug Console while you use the simple PHP call function...
console call function print Firebug Console debugg data Firebug
FirebugCodeCoverage
A Firefox add-on that customizes your JavaScript code by adding an entry function code coverage...
Pixel Perfect
Firefox add-on that allows every web developer to overlay a web composition....
composition overlay Firebug firebug extension overlay composition
FireQuery
A Firefox add-on integrated with Firebug...
customize browser optimize enhance Firebug Firebug enhancements
FBTracer
A lightweight Firefox extension that allows you to see the Flash Player's output trace in Firebug panelFlash Player Debugger...