During June 2025, contributed to the mozilla/gecko-dev repository by modernizing the layout system for components utilizing masonry patterns. The work involved migrating from deprecated masonry-* CSS properties to a grid-based approach using CSS Grid, which enhanced layout consistency, responsiveness, and maintainability. This refactor included removing outdated templates and redundant test files, thereby reducing technical debt and preparing the codebase for future enhancements. The implementation relied on strong skills in CSS, HTML, and JavaScript, as well as web platform testing practices, ensuring that the new grid-based layouts aligned with current standards and supported scalable, maintainable development moving forward.