Extension Tracker

Core Web Vitals Visualizer

10,000 users Rated 4.95 from 19 ratings Last updated 10 Oct 2026

By MarketingTracer Live in the Chrome Web Store mcffmgagphgpgkdclllnilokablhjcge Search Google ↗ Last checked 9 Nov 2026, 06:02 UTC

The listing

What the Chrome Web Store shows, as of the last check

Measure, visualize, and debug Core Web Vitals in real time. CrUX history, LCP/CLS/INP breakdowns and performance experimentsSummary from the listing
Developer
MarketingTracer
Enhanced Safe Browsing
Trusted. What this means →
Category
Productivity › Developer Tools
First published
29 Oct 2022
Last updated
10 Oct 2026
Version
1.22
Size
2.34 MiB
Minimum Chrome
88
Languages
1 language

English

Website
corewebvitals.io
Support page
https://www.corewebvitals.io/contact
See Chrome Web Store page ↗ View its code or download CRX ↗
Users over time As shown on the Chrome Web Store
9.8K10K10.2KTracking began 27 Sep 202627 Sep4 Oct11 Oct18 Oct25 Oct1 Nov8 Nov2026-09-27: 10,000 users2026-09-28: 10,000 users2026-10-05: 10,000 users2026-10-10: 10,000 users2026-10-17: 10,000 users2026-10-25: 10,000 users2026-11-01: 10,000 users2026-11-09: 10,000 users2026-10-17: new version10,0009.8K10K10.2KTracking began27 Sep18 Oct8 Nov2026-09-27: 10,000 users2026-09-28: 10,000 users2026-10-05: 10,000 users2026-10-10: 10,000 users2026-10-17: 10,000 users2026-10-25: 10,000 users2026-11-01: 10,000 users2026-11-09: 10,000 users2026-10-17: new version10K
Average rating
4.804.905.0027 Sep11 Oct25 Oct8 Nov4.954.804.905.0027 Sep18 Oct8 Nov4.95
Number of ratings
1927 Sep11 Oct25 Oct8 Nov191927 Sep18 Oct8 Nov19
New version One point per check. Source: the extension's public Chrome Web Store listing.
Show the numbers
CheckedUsersRatingRatings
2026-11-0910,0004.9519
2026-11-0110,0004.9519
2026-10-2510,0004.9519
2026-10-1710,0004.9519
2026-10-1010,0004.9519
2026-10-0510,0004.9519
2026-09-2810,0004.9519
2026-09-2710,0004.9519
Users, 7 days
No change
since a week ago
Users, 30 days
No change
+0.0%
Rank
#5,041
by users, of 292,131 extensions
In its category
#442
of 30,442 in Developer Tools

What changed

Every change found on a check, newest first

  1. New version 1.22, replacing 1.21.

Developer history

Moves to another publisher account and new contact emails, newest first

No move to another account and no new contact email since tracking began on 27 Sep 2026.

We know contact emails only by a keyed hash, so they're never shown. Recent account and contact changes →

What it can access

From the extension's manifest, in plain language

Every websiteIt can read and change your data on all the sites you visit.
Sites where it runs scripts
  • http://*/*Every website
  • https://*/*Every website
Browser features
  • debuggerUse Chrome's debugger on your tabs, which gives full control of their pages

More from this developer

Other extensions from the same publisher account

ExtensionUsersRatingRatingsCategory
CLS Visualizer9,000 4.3611 Developer Tools
Website Cache Warmer308 3.805 Developer Tools
All 3 extensions by MarketingTracer →

About this data

Collected from the extension's public Chrome Web Store listing. It's checked every week, because it has 1,000 or more users, and again whenever a new version appears. Last checked 9 Nov 2026, 06:02 UTC; next check around 16 Nov 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “Core Web Vitals Visualizer” (mcffmgagphgpgkdclllnilokablhjcge). Chrome Web Store data, last checked 2026-11-09. https://extensiontracker.com/extension/mcffmgagphgpgkdclllnilokablhjcge. Accessed 2026-11-13.
BibTeX
@misc{extensiontracker_mcffmgagphgpgkdclllnilokablhjcge,
  title   = {Core Web Vitals Visualizer (mcffmgagphgpgkdclllnilokablhjcge)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-11-09},
  url     = {https://extensiontracker.com/extension/mcffmgagphgpgkdclllnilokablhjcge},
  urldate = {2026-11-13}
}

The data is free to reuse under CC BY 4.0.

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