World Wide Web Consortium (W3C) The W3C Markup Validation Service. Worldspace FireEyes Web Accessibility Validation. WAVE Toolbar. Accessibility - Web Accessibility Checklist. The Web Developer Extension for Mozilla-based Browsers. You are here: Home > Resources > The Web Developer Extension for Mozilla-based Browsers Introduction to the Web Developer Extension The Web Developer Extension, created by Chris Pederick, is a very popular and useful resource for web designers.
This section will specifically focus on the tools this extension provides that can help developers create more accessible web content. Note This extension is designed for Mozilla, Mozilla Firefox and Netscape (version 6 or greater) and will run on any platform that these browsers support.