Are You Ready to Make Browsing Better?

Add-ons empower millions of Firefox users to personalize their browser's form and function. Why not show off your smarts by creating an add-on the whole world can use? Tools and tutorials you find here make it simple. So take a look and put your ingenuity in motion.

Start Making Add-ons

Learn & Explore

  • How-to Library

    Get add-on development guidance in a top-notch collection of tutorials, articles, and more.

  • API & Language Reference

    The official documentation on APIs and languages. What you need, when you need it, to create your masterpiece.

  • Case Studies

    Start-to-finish success stories. See how add-on developers made magic with Mozilla.

Create & Connect

  • Developer Forums

    Discuss development, ideas, and make key connection in the world of add-ons.

  • Add-on Builder

    Auto-generate add-on packaging by entering basic info and picking UI parts. Get working without setup.

  • Add-on Validator

    Check your add-on for common problems and errors. Open to anyone, not just add-ons hosted here.