Use HTML, CSS, and JavaScript expertise remotely to diagnose Firefox WebCompat bugs and deliver practical fixes with AI assistance.
Mozilla seeks a Contract Staff Software Engineer to reduce Firefox’s WebCompat backlog. You will investigate real-world site breakage, validate existing diagnoses, and turn reports into actionable or fixed bugs. The work emphasizes browser devtools, cross-browser diagnosis, and targeted interventions.
Key Responsibilities: Finish diagnosing long-tail WebCompat bugs
Verify diagnoses for reported site breakages
Write WebCompat interventions where appropriate
Develop and land easy AI-assisted fixes
Reproduce and triage incoming breakage reports
Requirements: Solid HTML, CSS, and JavaScript development skills
Comfort debugging real-world website breakage
Fluency with browser developer tools
Ability to perform cross-browser diagnosis
Comfort using AI tooling for diagnosis and fixes
Apply WebCompat debugging, browser devtools, and AI-assisted development skills to improve Firefox’s site compatibility.

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📌 WebCompat Staff Software Engineer (British Columbia)
🏢 Devconnectplatform
📍 British Columbia