Senior Contract C++ / JavaScript Software Engineer Firefox (Browser Engine)
Mozilla•Germany
Work Mode
🌐 Remote
Job Type
Contract
Posted
10/6/2026
Required Technical Skills
JavaScript
Role Overview & Requirements
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 as needed Fix the problems and pass
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