LightScout - Core Web Vitals Monitor

by NodeBridge Automation Solutions · Developer Tools

Manifest V3 Free

View in Chrome Web Store Data as of 16 Oct 2026

Track all 6 Core Web Vitals as you browse. Color-coded ratings, session grouping, CSV/JSON export, and Google Sheets sync.

Users

+2 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#211K

#176K among extensions

Version

1.2.0

updated 4 Mar 2026

Users

monthly, 8 months

Latest, 16 Oct 2026: 8 usersMove the mouse over the chart for any month

Ratings count

monthly, 8 months

Latest, 16 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About LightScout - Core Web Vitals Monitor

LightScout monitors all 6 Core Web Vitals in real time as you browse. See exactly how every page performs with color-coded ratings based on Google's thresholds. **Metrics tracked:** - LCP (Largest Contentful Paint) — loading performance - FCP (First Contentful Paint) — initial render speed - TTFB (Time to First Byte) — server response time - CLS (Cumulative Layout Shift) — visual stability - INP (Interaction to Next Paint) — responsiveness - FID (First Input Delay) — interactivity **Key features:** - Color-coded ratings: green (Good), yellow (Needs Work), red (Poor) - Session grouping by domain for easy comparison across pages - Export metrics as JSON or CSV for spreadsheets and reports - Optional Google Sheets sync for historical trend tracking - Tracking toggle to control when metrics are captured - Badge indicator shows page health at a glance **Privacy-first:** All data stays in your browser. Nothing is sent to external servers. No account required — works immediately after install. **Built for developers, designers, and SEO professionals** who want to understand real-world page performance without leaving the browser. Free. No premium tiers. No hidden features. Learn more at https://testscout.dev/lightscout Privacy policy: https://testscout.dev/lightscout/privacy