Over a two-month period, this developer focused on enhancing Federated Credential Management (FedCM) integration and robustness across SeleniumHQ/selenium and mozilla/gecko-dev repositories. They refactored the FedCM API implementation in Selenium, updating command definitions and introducing new HTML files to support FedCM interactions, while expanding test automation for dialog handling and account selection using Java and JavaScript. In mozilla/gecko-dev, they addressed a user-facing deadlock by implementing an abort path for failed account fetches before dialog closure, adding targeted end-to-end tests and updating test helpers. Their work emphasized API integration, web platform testing, and maintaining compatibility with existing test suites.