# GoogleChrome/web-vitals-extension

A Chrome extension to measure essential metrics for a healthy site

Repository: https://github.com/GoogleChrome/web-vitals-extension
Canonical: https://ross.abutalabs.com/products/web-vitals-extension
Homepage: https://chrome.google.com/webstore/detail/web-vitals/ahfhijdlegdabablpippeagghigmibma?hl=en
Language: CSS
License: Apache-2.0
License Family: permissive
Topics: performance, ux, developer-tools, web-performance, web-performance-testing, core-web-vitals
Archived: true
Last push: 2025-02-03T14:45:41+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 4, release rhythm 28, longevity 100
- inputs: {"age_days": 2337, "days_push": 576, "days_rel": 601, "gap_med": 60.5, "n_releases_24m": 3}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2380, forks 108 (observed 2026-08-28T04:06:42.285365+00:00)

## What it is
A Chrome extension by Google that measures Core Web Vitals (LCP, CLS, INP) plus diagnostic metrics (TTFB, FCP) in real time, matching how Chrome reports them to Google tools. It reached end of life in January 2025 as its functionality moved into the Chrome DevTools Performance panel.

## Use cases
- measure core web vitals for a page
- check LCP CLS and INP in the browser
- debug layout shift on my site
- see real user experience metrics while browsing
- compare local metrics with CrUX and PageSpeed Insights
- monitor web performance during development

## When to choose
- you are on Chrome 131 or earlier and need quick in-browser Core Web Vitals measurement
- you need a feature of the extension not yet available in DevTools live metrics

## When to avoid
- you use Chrome 132 or later - use the DevTools Performance panel instead
- you need maintained or updated tooling - the extension no longer receives updates
- you need lab-based performance auditing rather than live field-style metrics

## Facets
- artifact type: plugin
- maturity: abandoned
- function: monitoring, analytics, developer-tools
- domain: web-development, frontend, performance, developer-tools
- platform: browser, browser-extension
- tags: core-web-vitals, chrome-extension, web-performance, lcp, cls, inp, devtools, end-of-life

## Member repositories
- GoogleChrome/web-vitals-extension (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:42.285365+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:34:50.843835+00:00, confidence not recorded.
  - readme: https://github.com/GoogleChrome/web-vitals-extension (fetched 2026-08-28T04:06:42.285365+00:00, sha 4facd0fcf3b5)
  - homepage: https://chrome.google.com/webstore/detail/web-vitals/ahfhijdlegdabablpippeagghigmibma?hl=en (fetched 2026-08-29T10:15:44.568448+00:00, sha 67ddc599a679)
- Data as of 2026-08-30T08:39:29.467469+00:00.