Senior Contract C++ / JavaScript Software Engineer (Browser Engine)

Mozilla · Belgium, Denmark, Finland, France, Netherlands, Poland ·Posted 27 Oct 2026

Contract Belgium, Denmark, Finland, France, Netherlands, Poland

The role You will help the Firefox DOM Core team improve the health of the Session History area. You will write tests to improve the coverage; you will fix tests and/or problems to improve the Gecko correctness. Responsibilities Write Web-Platform tests to improve the coverage, and Gecko mochitests

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