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CLS Visualizer

Chrome extension by MarketingTracer · Productivity · Developer

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  • Established publisher
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A Chrome extension in Productivity · Developer with 9 000 users, a small but real audience.

No site access is declared in the manifest, so it cannot read the pages you open on its own.

What the developer says, and 1 screenshot

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
9 000
Rating
4.4 (11 ratings)
Users, last 16 days
unchanged
Rating, last 30 days
Not watched long enough to say
Version
1.4
Updated in the store
2022-11-20
Published
2020-11-13
Manifest
V3
Browser access
No permissions declared

How it has moved

Users
unchanged since 31.08
9k · 2 readings
  1. 2026-08-319k
  2. 2026-09-159k
Rating
unchanged since 31.08
reviewsrating 4.36 · 2 readings
  1. 2026-08-31reviews11rating4.36
  2. 2026-09-15reviews11rating4.36
Users
unchanged since 31.08
9k · 2 readings
  1. 2026-08-319k
  2. 2026-09-159k
Rating
unchanged since 31.08
reviewsrating 4.36 · 2 readings
  1. 2026-08-31reviews11rating4.36
  2. 2026-09-15reviews11rating4.36

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

No site access is declared in the manifest, so it cannot read the pages you open on its own.

We have not read this listing's manifest since we started keeping permission names. The counts above come from the last time we did.

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

MarketingTracer publishes 3 listings we track, 19k users between them.

  1. Core Web Vitals Visualizer MarketingTracer · Productivity · Developer · published 2022-10-29 10k users ★ 4.9
  2. Website Cache Warmer MarketingTracer · Productivity · Developer · published 2024-09-04 304 users ★ 3.8

Like this one

Listings the catalog judges closest in what they say they do.

  1. LCP & CLS Monitor Describes nearly the same job, smaller audience 1k users ★ 5.0
  2. Core Web Vitals Live Describes nearly the same job, smaller audience 120 users
  3. Core Web Vitals Visualizer Describes nearly the same job, with an established audience 10k users ★ 4.9
  4. Site Speed Insights: Web Vitals Visualizer Describes nearly the same job, smaller audience 21 users
  5. Core Web Vitals Checker — LCP, CLS & INP Overlay Describes nearly the same job, smaller audience 11 users

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

See what the panel does

Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.