Data Collection - MozillaWiki

At Mozilla, like at many other organizations, we rely on data to make product decisions. But here, unlike many other organizations, we balance our goal of collecting useful, high-quality data with our goal to give users meaningful choice and control over their own data. The Mozilla data collection program was created to ensure we achieve both goals whenever we make a change to how we collect data

[Rockridge]

Firefoxがユーザーから新たなデータを収集する場合、必ず管理責任者（data steward）のレビューを受けねばならない。現在、data stewardは複数いて担当が分かれているが、Necessity/Privacy/Transparency/Accountabilityの4つの基準は共通。