Ext Ops Panel
Open the app

LayoutSpector - UI Inspector & QA

Chrome extension by MrBrimseeker · Productivity · Developer

A Chrome extension in Productivity · Developer with 4 users, barely installed.

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

What the developer says, and 2 screenshots

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

Users
4
Rating
5.0 (2 ratings)
Users, last 4 days
+4
Rating, last 30 days
Not watched long enough to say
Version
1.3.1
Updated in the store
2026-09-11
Published
2026-09-11
Manifest
V3
Browser access
6 permissions

How it has moved

Users
+4 since 12.09
0-4 · 3 readings
2026-09-12: appeared in the store
  1. 2026-09-120appeared in the store
  2. 2026-09-133
  3. 2026-09-154
Rating
+5.00 since 12.09
reviewsrating 0.00-5.00 · 3 readings
2026-09-12: appeared in the store
  1. 2026-09-12reviews0rating0.00appeared in the store
  2. 2026-09-13reviews2rating5.00
  3. 2026-09-15reviews2rating5.00
Users
+4 since 12.09
0-4 · 3 readings
2026-09-12: appeared in the store
  1. 2026-09-120appeared in the store
  2. 2026-09-133
  3. 2026-09-154
Rating
+5.00 since 12.09
reviewsrating 0.00-5.00 · 3 readings
2026-09-12: appeared in the store
  1. 2026-09-12reviews0rating0.00appeared in the store
  2. 2026-09-13reviews2rating5.00
  3. 2026-09-15reviews2rating5.00

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.

  • Run its own code on the pages it can access scripting
  • Act on the current tab, but only after you click it activeTab
  • Put data on your clipboard clipboardWrite
Show the remaining 3
  • Open a panel beside the page sidePanel
  • Store data in your browser storage
  • Store data in your browser without the usual size limit unlimitedStorage

The full permission history for this extension

What changed recently

  1. Appeared in the store

The publisher

MrBrimseeker.

Like this one

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

  1. LayoutPilot Describes nearly the same job, smaller audience 5 users (last published figure)
  2. Visual Layout Inspector Describes nearly the same job, smaller audience 35 users ★ 5.0
  3. Traceo - UI Inspection & Visual Bug Reports Describes nearly the same job, smaller audience 177 users ★ 4.9
  4. UI Inspector Pro Describes nearly the same job, smaller audience 4 users
  5. Inspeck — Measure, Inspect & Edit Describes nearly the same job, smaller audience 36 users ★ 5.0

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.