Switch DOM Inspector to an over/under vertical layout instead of the usual side-by-side panel layout.
A tool for generating structured descriptor documents for HTTP accessible resources. HTML+RDFa based Linked Data is the default Descriptor Document format. Other formats are available via page hosted links or content negotiation.
Colorizer is a web development tool. It uses a color picker to change the color of HTML elements in real time.
Add-on to augment the Mozilla Add-on SDK documentation with examples that can be run right on the page