Web Directory

» Aardvark
   By clicking an element you will able to remove, view source, isolate and see element information.
   http://karmatics.com/aardvark/

» ColorZilla
   Assists with color related tasks. Provides a collection of tools, including a color picker, an eyedropper that helps to get a color reading from anywhere in the browser window and a palette viewer that allows bookmarking and share a color palette.
   http://www.colorzilla.com/

» Colour Contrast Analyser
   Reveals the colour contrast of all elements in the DOM.
   http://juicystudio.com/article/colour-contrast-analyser-firefox-extension.php

» Console²
   Firefox extension that replaces the JavaScript Console. Display errors filtered by type (Errors, Warnings, Messages), language (JavaScript, CSS, XML) and context (Chrome, Content). Useful for web and extension developers.
   http://console2.mozdev.org/

» DOM Inspector
   A tool that can be used to inspect and edit the live DOM of a web document or XUL application. Restores functionality present prior to Firefox 3.0. Description and user comments.
   https://addons.mozilla.org/firefox/addon/6622

» Dust-Me Selectors
   Finds and display unused CSS selectors.
   http://www.sitepoint.com/dustmeselectors/

» Firefox Extensions for Web Developers
   A list of extensions built primarily for web designers and programmers.
   http://loadaveragezero.com/drx/extensions

» Flash Tracer
   Shows all the output generated by any running flash swf movies ( the output generated by the trace flash method ).
   http://www.sephiroth.it/firefox/flashtracer/

» HTML Validator
   An HTML and SGML validator, based on the HTML Tidy and OpenSP algorithms originally developed by W3C. Checks pages on the fly.
   http://users.skynet.be/mgueury/mozilla/

» JS Console Extras
   Adds a JS Console context-menu item which presents a "Toolbars" submenu for hiding or showing the eval / mode toolbars.
   https://addons.mozilla.org/firefox/37/

» Leak Monitor
   Detects one very specific type of leak in chrome JavaScript and in Web pages.
   http://dbaron.org/mozilla/leak-monitor/

» Link Evaluator
   Evaluates the availability of on-line resources linked to from a given web page and assesses the response of each URL.
   http://evaluator.oclc.org/

» LinkChecker
   Check the validity of links in a html document.
   http://www.kevinfreitas.net/extensions/linkchecker/

» Michael's Firefox Extensions
   Extensions for HTML, CSS and RSS validation.
   http://www.nu22.com/firefox/

» Modify Headers
   Allows the user to add, modify and filter out HTTP request headers.
   http://modifyheaders.mozdev.org/

» MozLab
   A set of tools and libraries for developers of AJAX and Mozilla applications, packaged as an extension.
   http://hyperstruct.net/projects/mozlab

» Pixel Perfect
   Allows web developers and designers to easily overlay a web composition over top of the developed HTML.
   http://www.pixelperfectplugin.com/

» Tuvbar
   Toolbar extension for helping penetration-testers test the security of websites, networks and webpages.
   http://tuvbar.mozdev.org

» Web Developer
   A toolbar with useful functions for website authors. Includes download, full feature list, screenshots, and discussion forums.
   http://chrispederick.com/work/web-developer/

» X-Ray
   Shows the tags on a page without viewing the sourcecode.
   http://www.designmeme.com/xray/

» XPather
   Generates XPaths while browsing or inspecting HTML/XML/*ML documents, evaluates XPaths, inspects the results and extracts the content.
   http://xpath.alephzarro.com/

» cuneAform HTML/XHTML Editor
   cuneAform has been designed to create a HTML Editor that anyone can use.
   http://cuneaform.mozdev.org/