Worked on stabilizing the compute_pressure_duplicate_updates test suite in the mozilla/gecko-dev repository, focusing on reducing flaky continuous integration behavior and improving test reliability. Addressed a bug by correcting a misplaced parenthesis, ensuring the ownContributionEstimate parameter was passed correctly within JavaScript-based tests. Enhanced the suite by adding assertions to validate that ownContributionEstimate equals 0.2 for both 'critical' and 'nominal' states, which helped prevent regression in test flakiness. Consolidated duplicate update tests to improve coverage and maintainability. Demonstrated strong skills in JavaScript, web platform testing, and debugging, contributing to more robust and reliable performance validation workflows.