
In June 2025, Ben Vandersloot enhanced the mozilla/gecko-dev repository by delivering reliability and automation improvements for Federated Credential Management (FedCM). He implemented the FedCM Continuation API and refactored FedCM to use a managed actor model, which improved modularity and testability. Using C++ and JavaScript, Ben removed legacy Lightweight FedCM codepaths, aligning the codebase with current standards and reducing maintenance overhead. He also expanded Marionette’s automated test coverage by adding CHIPS cookies support and addressed partitioning correctness for site data. This work demonstrated depth in browser architecture, security, and cross-process communication, resulting in more maintainable and robust authentication flows.

June 2025: Delivered FedCM reliability and automation improvements in mozilla/gecko-dev, focusing on user consent flow quality, maintainability, and test coverage. Key features include the FedCM Continuation API, Marionette CHIPS cookies support, and a refactor to a managed actor, plus cleanup of Lightweight FedCM codepaths and partitioning correctness fixes. These changes reduce maintenance cost, improve security posture, and enhance automation reliability.
June 2025: Delivered FedCM reliability and automation improvements in mozilla/gecko-dev, focusing on user consent flow quality, maintainability, and test coverage. Key features include the FedCM Continuation API, Marionette CHIPS cookies support, and a refactor to a managed actor, plus cleanup of Lightweight FedCM codepaths and partitioning correctness fixes. These changes reduce maintenance cost, improve security posture, and enhance automation reliability.
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