About the team and role:

  • The WebExtensions platform powers the add-ons ecosystem in Firefox.
  • As a WebExtensions Engineer, you will help implement new extension capabilities and improve existing APIs.
  • Your work will keep extensions safe, powerful, and reliable for developers and millions of Firefox users.

What you’ll do:

  • Contribute to Mozilla-owned extensions and system add-ons.
  • Participate in open source workflows: code reviews, pull requests, and discussions in Bugzilla/GitHub.
  • Support extension developers by helping diagnose issues and improving tooling/documentation.

What you’ll bring:

  • 4+ years of professional experience in software development.
  • Strong proficiency in JavaScript, DOM APIs, HTML, and CSS.
  • Familiarity with modern browser architecture and debugging tools.

Mozilla Corporation

Mozilla Corporation is a non-profit-backed technology company that has shaped the internet for the better over the last 25 years. They make pioneering brands like Firefox, the privacy-minded web browser, and have over 225 million people around the world using their products each month.

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