A Chrome extension that overlays real-time web performance metrics on any page — FPS, Core Web Vitals, memory usage, and long task detection in one panel.
dev-tools-extension adds a floating performance panel to any webpage in Chrome. It tracks real-time metrics including FPS, frame render time, and all Core Web Vitals (FCP, LCP, CLS, TTFB, INP) alongside memory and DOM statistics.
The panel appears in the bottom-left corner with toggle and reset controls. Built for developers who want quick performance visibility without opening DevTools.