Contract Staff Software Engineer-Bug Burndown at Mozilla Corporation Team: Firefox Locations: Remote Germany, Remote UK, Remote Canada You will help reduce Firefox’s Web

Compat bug backlog by finishing or verifying the diagnosis of the long tail of site-breakage bugs, and by writing interventions or simple fixes (often with AI assistance).

You turn a large queue of reported breakages into diagnosed, actionable, or fixed bugs.

Responsibilities Finish diagnosing, or verify the diagnosis of, long-tail Web

Compat bugs.

Write Web

Compat interventions where appropriate.

Write simple fixes (AI-assisted) and land them.

Reproduce and triage incoming site-breakage reports.

Required qualifications Solid web development (HTML, CSS, Java

Script) and comfort debugging real-world site breakage.

Fluent with browser devtools and cross-browser diagnosis.

Comfortable using AI tooling to speed up diagnosis and fixes.

Preferred Gecko knowledge is a robust plus (but can be taught).

Prior Web

Compat or web-standards experience.

📌 Contract Staff Software Engineer-Bug Burndown (Toronto)
🏢 Mozilla
📍 Toronto