Help Firefox address real-world site breakage through browser debugging, cross-browser diagnosis, and targeted WebCompat interventions at Mozilla.
This Contract Staff Software Engineer role centers on incoming reports and a long tail of WebCompat bugs. You will reproduce breakages, complete or verify diagnoses, and create actionable outcomes. Straightforward fixes may use AI tooling before being landed.
Key Responsibilities: Reproduce incoming Firefox site-breakage reports
Triage reported WebCompat bugs
Complete diagnosis of long-tail breakages
Verify diagnoses and clarify actionable bugs
Land simple fixes with AI assistance
Requirements: Experience with HTML, CSS, and JavaScript
Strong browser developer tools experience
Cross-browser diagnosis comfort
Ability to use AI tooling effectively
Gecko knowledge is a strong plus
Bring browser diagnosis, WebCompat triage, and practical fixing skills to help turn Firefox site-breakage reports into resolved bugs.

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📌 Firefox WebCompat Bug Triage Engineer (Quebec City)
🏢 Mozilla
📍 Quebec City