Worked on the ladybirdbrowser/ladybird project to enhance browser UI reliability and user experience consistency. Addressed hit testing issues by updating LibWeb to properly respect negative z-index stacking contexts, ensuring accurate user interactions even with obscured elements. Refined label element rendering by removing the default inline-block style, which reduced layout anomalies for empty labels and aligned behavior with Chromium and Gecko browsers. Added regression tests to validate these changes and prevent future issues. Utilized C++, CSS, and JavaScript to implement these improvements, focusing on front end development and robust testing practices to deliver a more predictable and standards-compliant browser interface.