Chrome Extensions UX/UI Best Practices Comprehensive UX/UI design guide for Chrome Extensions, optimized for Manifest V3. Contains 42 rules across 8 categories, prioritized by impact to guide extension UI development and code review. When to Apply Reference these guidelines when: - Building new Chrome extension user interfaces - Choosing between popup, side panel, or content script UI - Implementing accessible, keyboard-navigable interfaces - Designing loading states, error handling, and feedback patterns - Creating options pages and settings persistence Rule Categories by Priority | Priority…