mozilla/gecko-dev
Jun 2025 – Jul 2025
2 Months active
Languages Used
C++CSSFluentIDLJavaScriptXULHTMLJava
Technical Skills
Browser DevelopmentC++ DevelopmentFront-end DevelopmentInterface Definition Language (IDL)LocalizationPreference Management
Leo Liu
PROFILE
Leo Liu
Contributed to mozilla/gecko-dev by developing and refining privacy and tracking protection features over a two-month period. Focused on browser context identification, streamlined the tracker blocking UI, and implemented robust migration tests to ensure data integrity during upgrades. Expanded end-to-end testing for Tracking Protection across multiple modes, introduced telemetry for tracking exceptions user experience, and enhanced privacy preference controls with dependency logic. Leveraged C++, JavaScript, and Kotlin to deliver cross-platform improvements, integrating with Mozilla’s preferences system and telemetry infrastructure. The work emphasized maintainable code, comprehensive testing, and clear user controls, resulting in more reliable privacy features and simplified user experience.
Overall Statistics
Feature vs Bugs
83%Features
Repository Contributions
14Total
Bugs
1
Commits
14
Features
5
Lines of code
5,388
Activity Months2
Your Network
876 peopleSame Organization
@mozilla.com376
Shared Repositories
500
Work History
July 2025
11 Commits • 3 Features
Jul 1, 2025July 2025 — GeckoDev contributions focused on expanding Tracking Protection (TP) testing, telemetry, and UI controls across Standard, Strict, and Custom modes. Delivered end-to-end tests for TP allow-list categories, introduced telemetry for Tracking Exceptions UX, and added UI checkboxes with dependency logic in privacy preferences. These efforts improve testing coverage, enable data-driven UX decisions, and provide clearer user controls across platforms (including Fenix).
11 Commits • 3 Features
Jul 1, 2025July 2025 — GeckoDev contributions focused on expanding Tracking Protection (TP) testing, telemetry, and UI controls across Standard, Strict, and Custom modes. Delivered end-to-end tests for TP allow-list categories, introduced telemetry for Tracking Exceptions UX, and added UI checkboxes with dependency logic in privacy preferences. These efforts improve testing coverage, enable data-driven UX decisions, and provide clearer user controls across platforms (including Fenix).
July 2025
June 2025
3 Commits • 2 Features
Jun 1, 2025June 2025 – mozilla/gecko-dev: Delivered targeted enhancements to Browser Context tracking and Tracker Blocking UI, and hardened upgrade migrations. Key work includes exposing browserId for blocked channels across contexts, removing the Level 2 blocklist option to streamline UI, and adding a migration test to reset content blocking preferences on data-version upgrades. These changes improve cross-context identification, reduce UI complexity, and strengthen data integrity, delivering measurable business value through more reliable blocking behavior, simplified user experience, and reduced maintenance overhead.
June 2025
3 Commits • 2 Features
Jun 1, 2025June 2025 – mozilla/gecko-dev: Delivered targeted enhancements to Browser Context tracking and Tracker Blocking UI, and hardened upgrade migrations. Key work includes exposing browserId for blocked channels across contexts, removing the Level 2 blocklist option to streamline UI, and adding a migration test to reset content blocking preferences on data-version upgrades. These changes improve cross-context identification, reduce UI complexity, and strengthen data integrity, delivering measurable business value through more reliable blocking behavior, simplified user experience, and reduced maintenance overhead.
Activity
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Quality Metrics
Correctness93.0%
Maintainability88.0%
Architecture83.6%
Performance81.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++CSSFluentHTMLIDLJavaJavaScriptKotlinTOMLTypeScript
Technical Skills
Android DevelopmentBrowser DevelopmentBrowser TestingC++ DevelopmentConfigurationConfiguration ManagementEnd-to-End TestingFront-end DevelopmentInterface Definition Language (IDL)JavaJavaScriptKotlinLocalizationMobile DevelopmentMozilla Preferences System
Repositories Contributed To
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