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Senior Software Engineer, Firefox Desktop

Mozilla

toronto, on, Canada Full-time July 13, 2026
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Vacancy Description

The Firefox team is a community of engineers who care deeply about delivering the fastest, friendliest, most usable browser possible. We are responsible for making the things you see in the browser work securely, quickly, and well! Desktop Integrations is a cross‑functional team that focuses on updates, installs, and integrating Firefox with different OS platforms. As part of the Desktop Integrations team, you will be responsible for all things related to OS integration (particularly Windows and macOS) and helping us grow our user base.

About The Role

A Senior Software Engineer contributes to architectural discussions and drives feature development within a team. At Mozilla, Senior Engineers are expected to work independently on scoped projects, collaborate closely with peers, and play a key role in delivering high‑quality software that aligns with team goals.

What You’ll Do

  • Contribute to the development and improvement of Firefox feature...

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