Web Performance Overlay icon

Web Performance Overlay

by ThatperformanceDude · Developer Tools
Manifest V3 Free
View in Chrome Web Store Data as of 16 Oct 2026

A lightweight Chrome extension that displays Core Web Vitals (LCP, FCP, CLS, TTFB) directly on any website. Capture a “performance…

Users
24
−2 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
2
0 in 30 days
Store rank
#141K
#117K among extensions
Version
0.1.4
updated 16 Sep 2025

Users

monthly, 14 months
01428Aug 2025Apr 2026Oct 2026
Latest, 16 Oct 2026: 24 usersMove the mouse over the chart for any month

Ratings count

monthly, 14 months
012Aug 2025Apr 2026Oct 2026
Latest, 16 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 Web Performance Overlay

A lightweight Chrome extension that displays Core Web Vitals (LCP, FCP, CLS, TTFB) directly on any website. Capture a “performance snapshot” at one point in time and easily compare it against a later visit. For example, record metrics on YouTube at 10:30 AM, revisit at 3:00 PM, and instantly see how site performance has changed. Perfect for developers, testers, and performance engineers who need a simple overlay to track, measure, and compare website speed and user experience over time.

Growth

WindowUsersChangeRatingsRating
7 days−1−4.0%00.00
30 days−2−7.7%00.00
6 months+3+14.3%00.00
1 year+16+200.0%00.00

Chrome Web Store search rankings

Where Web Performance Overlay appears when people search the store, with the 30 day change
Search phrasePosition30 days
performance#42+7

Version history

3 versions recorded
0.1.416 Sep 2025
0.1.328 Aug 2025
0.1.227 Aug 2025

Details

Category
Developer Tools
First seen
27 Aug 2025
Size
15 KB
Languages
en-US
Pricing
Free
Privacy policy
github.com
Extension ID
kkfmeolohhpomajbokhoeogiejbfpeen

Permissions and risk

Moderate riskimpact 2, likelihood 2
Permissions
storagedownloads
Site access
<all_urls>
Can read and change data on every website you visit.

Alternatives to Web Performance Overlay

Extensions that rank for the same store searches or share the Developer Tools category, ordered by users
Lighthouse1M users · 4.2 ★ · 334 ratings WAVE Evaluation Tool700K users · 3.9 ★ · 161 ratings GoFullPage - Full Page Screen Capture11M users · 4.9 ★ · 84,440 ratings touchenex 확장8M users · 1.2 ★ · 6,328 ratings TrendAI™ Toolbar for Enterprise7M users · 1.2 ★ · 45 ratings SentinelOne6M users · 1.4 ★ · 190 ratings React Developer Tools5M users · 3.5 ★ · 1,644 ratings ColorZilla4M users · 4.7 ★ · 3,939 ratings