Build Your Own WebExtension
Add-on for Firefox

Martin Giger



  • Introduction
  • Build your first WebExtension
  • Create an original add-on and share it on
  • Continue the conversation

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Please ensure you have the latest Firefox Developer Edition

Which extensions do you use?

Do you know...

  • JS?
  • HTML?
  • WebExtensions/Chrome Extensions?

About Add-ons

  • WebExtensions are one or more HTML pages
  • They get additional APIs to
    • Block ads
    • Re-style websites
    • Show notifications
    • and a lot more
  • WebExtensions can be compatible with Firefox, Edge, Chrome and Opera

Build your first WebExtension

Great Work!

What now?

Continue the Conversation

Get involved with WebExtensions

Build Your Own WebExtension Add-on for Firefox

By Martin Giger

Build Your Own WebExtension Add-on for Firefox

Add-ons provide a safe, simple, and powerful way to personalize your browsing experience. With WebExtensions APIs, it’s easier than ever to create extensions that can be easily ported to Firefox, Chrome, Edge, and Opera. Through this activity you’ll help connect new developers with an opportunity to create add-ons to solve real problems and make their lives and the web better.

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