About this Collection
13 Add-ons in this Collection
Firebug by Joe Hewitt, Jan Odvarko, others
The Web Developer extension adds various web developer tools to the browser.
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
Help make Firefox better. The Add-on Compatibility Reporter enables you to report if the Firefox add-ons that you're using are working properly.
CodeBurner is a Firefox add-on that integrates with Firebug, to extend it with reference material for HTML and CSS.
An indicator showing HTTP/2 and SPDY support in the address bar.
Send and receive signed and encrypted messages in Gmail.
Testing tool for regular expressions with color highlighting (including submatches) and helpers for creating expressions
Displays JSON data in a collapsible tree structure with syntax highlights.
Testing and demonstration of the the features of the OpenAjax Alliance (OAA) Accessibility Evaluation Library API, Rules and Rulesets for evaluating web content for compliance with requirements of the W3C WCAG 2.0 Success Criteria.