LCP & CLS Monitor icon

LCP & CLS Monitor

by Dima Solovei · Developer Tools
FeaturedManifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

Core Web Vitals Largest Contentful Paint and Cumulative Layout Shift Monitor

Users
1,000
0 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
2
0 in 30 days
Store rank
#30K
#25K among extensions
Version
1.01
updated 26 Apr 2021

Users

monthly, 3 years
2006001,000Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 1,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
012Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 2 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 LCP & CLS Monitor

This helps to identify problematic elements causing CLS performance issues on the page by visually highlighting them with a red border. Also in the lower left corner you can watch the change of this indicator while staying on the page.

Growth

WindowUsersChangeRatingsRating
7 days0+0.0%00.00
30 days0+0.0%00.00
6 months0+0.0%00.00
1 year0+0.0%00.00

Chrome Web Store search rankings

Where LCP & CLS Monitor appears when people search the store, with the 30 day change
Search phrasePosition30 days
monitor#40−16

Version history

2 versions recorded
1.0126 Apr 2021
1.025 Apr 2021

Details

Category
Developer Tools
First seen
25 Apr 2021
Size
20 KB
Languages
en
Pricing
Free
Extension ID
lcifpchofigigpgmhpghagcifokadjaa

Permissions and risk

Minimal riskimpact 2, likelihood 0
Permissions
storagescriptingwebNavigation
Site access
http://*/https://*/

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