Serves as a Firefox-integrated tool for web developers, designers, and casual readers. Removes unwanted banners, views source codes of elements, and explores the block by block creation of pages.

Downloadable toolbar offering a variety of web development tools and options. Also works with Flock and Seamonkey.

Advanced eyedropper, color picker, and palette viewer usable as a Firefox extension.

Web development extension for Firefox. Edits, debugs, and monitors CSS, HTML, and JavaScript in any web page.

AJAX development add-on for Firefox enabling access to the Firebug Console using a simple PHP method call.

Extension based on the Tidy and OpenSP algorithms. Adds HTML validaton within the Firefox and Mozilla browsers.

Color contrast analyzer. Presents color combinations used in pages and summarizes the foreground color, background color, luminosity contrast ratio, and color difference.

Color coded webpage link checker. Classifies broken, forwarded, good, and skipped links.