Monitor Dog is a Chrome extension designed to enhance web app performance by tracking UI/UX metrics in real-time. This tool quietly observes layout shifts, input delays, and content loading times, providing immediate feedback on potential issues that could affect user experience. With its intuitive color-coded logging system, users can quickly identify performance problems: green indicates optimal performance, orange suggests caution, and red signifies critical issues that need addressing.

This free add-on serves as a performance watchdog for web developers, alerting them to metrics such as Cumulative Layout Shift, First Input Delay, and Largest Contentful Paint. While it does not directly resolve bugs, Monitor Dog acts as an essential companion in the optimization process, ensuring that web applications maintain a high standard of performance and user satisfaction.