Get add-on development guidance in a top-notch collection of tutorials, articles, and more.
Getting Started
Learn the basics of developing an extension on the Mozilla platform with this section full of beginner's guides.
Extension Development
Once you know the basics, these guides will help you with intermediate to advanced extension development topics.
Thunderbird & Mobile Add-ons
Add-ons aren't just for Firefox. Learn how to extend other Mozilla applications, such as the Thunderbird mail client and Firefox for mobile devices.
Theme Development
Style Mozilla applications the way you want with pixel-perfect themes.
Other Types of Add-ons
Find information on Search Plug-ins, Jetpack, Personas, and other types of add-ons here.
