mozilla/gecko-dev
Jun 2025 – Jun 2025
1 Month active
Languages Used
CSSHTMLJavaScript
Technical Skills
CSSCSS Anchor PositioningFront End DevelopmentJavaScriptTestingWeb Development
Antti Koivisto
PROFILE
Antti Koivisto
Worked on the mozilla/gecko-dev repository to expand and stabilize CSS test coverage, focusing on anchor positioning and color inheritance in drop-shadow filters. Developed comprehensive Web Platform Tests using CSS, HTML, and JavaScript to validate layout behavior across pseudo-elements, implicit anchors, popovers, and anchor-name mutations. Integrated these tests with cross-browser export workflows to ensure consistency and reliability between engines. Enhanced test stability by refining edge-case handling, reducing flakiness in continuous integration pipelines. This work improved confidence in CSS rendering correctness and accelerated issue detection, supporting robust front end development and more reliable web platform testing for future browser updates.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
6Total
Bugs
0
Commits
6
Features
2
Lines of code
413
Activity Months1
Your Network
1094 peopleSame Organization
@apple.com594
Shared Repositories
500
Work History
June 2025
6 Commits • 2 Features
Jun 1, 2025June 2025 summary for mozilla/gecko-dev focused on expanding and stabilizing critical CSS tests to reduce regression risk in layout behavior and color rendering. Delivered comprehensive test coverage for CSS anchor positioning and color inheritance in drop-shadow, aligned with cross-browser export practices to enhance reliability across engines. This work improves confidence in CSS rendering correctness and supports faster issue detection in CI pipelines.
6 Commits • 2 Features
Jun 1, 2025June 2025 summary for mozilla/gecko-dev focused on expanding and stabilizing critical CSS tests to reduce regression risk in layout behavior and color rendering. Delivered comprehensive test coverage for CSS anchor positioning and color inheritance in drop-shadow, aligned with cross-browser export practices to enhance reliability across engines. This work improves confidence in CSS rendering correctness and supports faster issue detection in CI pipelines.
June 2025
Activity
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Quality Metrics
Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance100.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
CSSHTMLJavaScript
Technical Skills
CSSCSS Anchor PositioningFront End DevelopmentJavaScriptTestingWeb DevelopmentWeb Platform Testing
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline