Hello.

Feature Policy is a new web platform API designed to help developers maintain control over their web app's performance, security, and user experience. It allows developers to define policies that restrict access to certain features or modify the browser's default behavior. Examples include controlling autoplay, access to sensitive APIs, usage of fullscreen, preventing use of outdated APIs, and managing image sizes. Policies act as a contract between the developer and the browser, ensuring the developer's intent is followed even as the project grows and evolves. While adoption is a concern, its potential benefits for performance, security and privacy are substantial, especially if tied to incentives like app store listings.