Worked on stabilizing the browser test environment for the cloudflare/playwright repository by introducing a default user agent across all browser contexts, aiming to reduce test flakiness and improve reliability in continuous integration workflows. Leveraged TypeScript and front end development skills to implement an end-to-end test that verifies browser launches with the specified user agent, ensuring consistent behavior across environments. Expanded the skipTests configuration to include additional audio playback scenarios, broadening test coverage and addressing edge cases. Focused on test automation and suite maintenance, these changes provided a more robust foundation for cross-environment testing and enhanced the reliability of automated test results.