Apply web standards experience and Gecko knowledge to Firefox’s WebCompat backlog, writing interventions and simple fixes with AI assistance.

Mozilla’s Contract Staff Software Engineer assignment focuses on site-breakage bugs affecting real-world web compatibility. You will investigate reported issues, validate diagnoses, and reduce the queue through interventions or landed fixes. The position combines web development with browser-focused triage.

Key Responsibilities:

- Investigate long-tail WebCompat site-breakage bugs
- Validate diagnoses before making bugs actionable
- Create appropriate WebCompat interventions
- Develop and land straightforward fixes
- Use AI assistance during diagnosis and fixing

Requirements:

- Solid web development using HTML, CSS, and JavaScript
- Comfort debugging real-world site breakage
- Fluency with browser developer tools
- Prior WebCompat or web-standards experience
- Gecko knowledge or willingness to learn it

Combine web standards, Gecko, and browser debugging expertise to make Firefox site-breakage bugs diagnosed, actionable, or fixed.

📌 Web Standards Software Engineer Firefox (Canada)
🏢 Mozilla
📍 Canada