Developer Resources

FireScope is a Firefox add-on that integrates with Firebug, to extend it with reference material for HTML and CSS. The extension's core functionality is centered around a new Reference panel, which contains a search tool for looking up HTML elements, attributes, and CSS properties. The extension also hooks into context-menus in the HTML and CSS panels, the DOM crumbtrail, and the Inspector, adding options to look up a selected item (ie. search for it in the Reference panel) or to view a code example.

Advanced Eyedropper, Color Picker, Palette Viewer and other colorful goodies for your Firefox.

A very useful debugging tool. Inspect and explore your HTML, CSS, JavaScript, and Ajax in one little console! You can even edit some parts of the DOM for debugging right in the browser! I honestly don't know what I would do without it!