During July 2025, Tim Nguyen enhanced text measurement reliability on HTML Canvas within the mozilla/gecko-dev repository by developing a targeted Web Platform Test. He implemented a test that verifies a null character contributes zero width when measuring text, addressing inconsistencies across canvas contexts such as 2D and offscreen canvases. Using JavaScript, HTML, and YAML, Tim integrated the test into the Web Platform Tests workflow with a test-only directive, ensuring no production impact. His work focused on strengthening rendering reliability, closing a gap in cross-context text measurement, and aligning with CI standards through thorough code review and collaborative engineering practices.