During July 2025, Daijiro Wachi enhanced the robustness of URL port parsing in the mozilla/gecko-dev repository by expanding Web Platform Test coverage. He focused on edge cases involving port values containing newlines or tabs and scenarios where a port is specified with an empty host, addressing potential parsing ambiguities. Using C++ and Python, Daijiro implemented two targeted test commits linked to specific bug reports, ensuring that the URL parsing logic correctly handles these less common inputs. His work emphasized test-driven development and cross-platform validation, strengthening the test suite to reduce future regressions and improve the reliability of URL handling.