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Benjamin VanderSloot

PROFILE

Benjamin Vandersloot

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.

Overall Statistics

Feature vs Bugs

20%Features

Repository Contributions

27Total
Bugs
8
Commits
27
Features
2
Lines of code
37,589
Activity Months1

Work History

June 2025

27 Commits • 2 Features

Jun 1, 2025

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.

Activity

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Quality Metrics

Correctness90.8%
Maintainability87.0%
Architecture90.0%
Performance81.8%
AI Usage20.0%

Skills & Technologies

Programming Languages

C++IDLJavaScriptWebIDLYAML

Technical Skills

API DesignAPI DevelopmentAPI ImplementationAPI RefactoringActor ModelAsynchronous ProgrammingBackend DevelopmentBrowser ArchitectureBrowser AutomationBrowser DevelopmentBrowser InternalsBrowser SecurityBrowser TestingC++C++ Development

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

mozilla/gecko-dev

Jun 2025 Jun 2025
1 Month active

Languages Used

C++IDLJavaScriptWebIDLYAML

Technical Skills

API DesignAPI DevelopmentAPI ImplementationAPI RefactoringActor ModelAsynchronous Programming

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