the page while seeing the content at the same time, and matching elements will be highlighted. Additionally, you can auto-select elements when hovering or via the context menu. FireFontFamilyhttps://addons.mozilla.org/en-US/firefox/addon/firefontfamily/?src=apiHighlight the rendered font-family in Firebug CSS panel Firepickerhttp://thedarkone.github.com/firepicker/Adds a small color picker dialog when editing CSS rule in Firebug. The addon scans for values that can be parsed as CSS colors (#abc, rgb(1,2,3), blue, red etc.) and displays them in a drop-down list right below the firebug's CSS editor box. Clicking on the color value in the drop-down brings up a color picker dialog. FireQueryhttp://firequery.binaryage.com/FireQuery is a Firefox extension integrated with Firebug. jQuery expressions are intelligently presented in Firebug Console and DOM inspector attached jQuery data are first class citizens elements in jQuery collections are highlighted on hover jQuerify: enables you to inject jQuery into any web page jQuery Lint: enables you to automatically inject jQuery Lint into the page as it is loaded (great for ad-hoc code validation) Flashbughttp://blog.coursevector.com/flashbugFlashbug is a Firebug extension for Flash. It displays all the running .SWF file trace output and requires Flash Player Debugger to work properly. Utilizes Firebug’s built in search feature – When you search for any words in the logs, the words will be highlighted in real-time. Displays Trace logs – Displays the traces emitted from all Flash instances playing in any browser. Displays Policy logs – Displays the policy log traces emitted from the Flash Player. These traces usually occur when using cross-domain policies or loading assets from a different domain. Configure Debug Player settings – The Flash Player itself can be configured to trace out data differently. Those options are available in the preferences window. Trace filters – There are a few builtin filters to display your traces differently. Built-in Links – Any URLs that are detected in the traces will be dot underlined. Read SharedObject – Read any Shared Objects associated with a page. Read AMF/Remoting Request/Response Data – View AMF data sent to and from the page to the server. Read SWFs – View SWF internal assets and data. Export SWF assets directly from Flashbug. Inline Code Finder for Firebughttp://robertnyman.com/inline-code-finder/Inline Code Finder is a tool to traverse through all elements in a web page, and when it finds a HTML element with any of these, it will highlight them: Inline JavaScript events Inline style javascript: links Page Speed for Firebughttp://code.google.com/speed/page-speed/Page Speed is a tool for optimizing the performance of web pages, it allow you to evaluate the performance of your web pages and to get suggestions on how to improve them. Pixel Perfect for Firebughttp://www.pixelperfectplugin.com/Overlay a web composition over top of the developed HTML. By toggling the composition on and off, the developer can visually see how many pixels they are off in development.Pixel percect has an opacity option so that you can view the HTML below the composition. By being able to see both the composition and the HTML you can now simultaneously use Firebug while Pixel Perfect is still in action.