ExtSpot
PerfLens icon

PerfLens Chrome Extension Analysis

Developer & Designer Tools

Chrome extension ID: icnjjhkenmgbfiobglglonpdjdpeeheh

A developer utility that monitors live page timing, including Core Web Vitals, layout shifts, and resource weight. It provides both a quick-glance popup score and a detailed DevTools panel with plain-language explanations tailored to the page's framework.

Developer:Sharaj
Version:2.2
Size:222KiB
Last updated:
View developer profile
External:Chrome Web StoreOfficial website

Overview

Installs

0

Rating

★ —

0 reviews

Languages

1 locales

Includes English

Market analysis

Review-backed positioning, friction, and market signals for this Chrome extension.

No review samples found

Macro category

Developer & Designer Tools

Pricing friction

Low review signal

Complaint intensity

Low review signal

Listing & review signals
Observed signals from store listing text and review samples.

Listing positioning

PerfLens positions itself as a privacy-focused, real-session performance observer that operates entirely locally. It differentiates itself from synthetic lab tests by analyzing actual browsing sessions without requiring an account.

Inferred product pattern

Local-first RUM (Real User Monitoring) tool for developers focusing on privacy and immediate feedback.

Review-backed pain points

Review-backed data is not available.

Observed feature gaps

No review data available to identify gaps; the listing claims comprehensive coverage of framework detection and performance metrics.

Tags
Web PerformanceCore Web VitalsDeveloper ToolsPerformance Monitoring
Target users

- Web Developers

- Frontend Engineers

- Performance Specialists

- SEO Professionals

Primary use cases

- Real-time performance monitoring

- Analyzing Core Web Vitals in live sessions

- Debugging layout shifts

- Evaluating resource weight and page timing

Positive themes

- Review-backed data is not available

Negative themes

- Review-backed data is not available

Observed friction

- No pricing information is mentioned in the listing, and no reviews exist to indicate pricing friction.

Evidence boundary: Data extracted exclusively from the Chrome Web Store listing. Lack of user reviews prevents validation of product claims or identification of user-experienced issues.
Complaint summaries
Review-backed complaint signals grouped by operational area.

Support

Review-backed data is not available.

Reliability

Review-backed data is not available.

Privacy

Review-backed data is not available.

Access & pricing

- No clear monetization signal

- No account requirement observed

- No clear pricing signal

Store listing facts

Listing assets

- Screenshots: 5

- Videos: 0

- Languages: 1

Trust signals

- Developer contact

- Official website

Store metadata

- Version: 2.2

- Size: 222KiB

- Last updated:

Listing SEO keywords

Search intent keywords
Keyword signals for evaluating how users may discover, compare, or search for this extension category.

Core discovery

real-session performance observerCore Web Vitals extensionlocal page timing toolweb performance monitor

Comparison

PerfLens vs LighthousePerfLens vs PageSpeed Insights

Problem

slow page loadlayout shift debuggingweb resource weightperformance bottlenecks

Alternative

Core Web Vitals toolweb performance analyzerDevTools performance extension

Similar extensions

Jump to related discovery paths:

More in developerMore from this developer

Screenshots

PerfLens screenshot
PerfLens screenshot
PerfLens screenshot
PerfLens screenshot
PerfLens screenshot

Links

Website: sharaj.pages.dev

Recommended Chrome extensions

Related listings from the same category, trending peers, and the same publisher portfolio.

Browse developer
QAtalyst - AI Test Case Generator icon

QAtalyst - AI Test Case Generator

Sharaj

AI test case generator for Jira. Turn tickets, requirements & acceptance criteria into positive, negative & edge-case tests.

Installs

50

Rating

★ —

XHRScribe - AI API Test Generator icon

XHRScribe - AI API Test Generator

Sharaj

Generate API tests from network traffic. Capture XHR, Fetch & GraphQL and export Jest, Playwright, Cypress & Postman tests.

Installs

19

Rating

★ —

Eye Dropper icon

Eye Dropper

Eye Dropper

Pick colors from any website.

Installs

1.0M+

Rating

★ 4.3

Lighthouse icon

Lighthouse

lighthouse-extension-owners

Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.

Installs

1.0M+

Rating

★ 4.4

Topaz SigPlusExtLite Extension icon

Topaz SigPlusExtLite Extension

Topaz Systems Inc

The Topaz SigPlusExtLite Chrome Extension enables users to capture signatures on a wide variety of Topaz signature pads.

Installs

1.0M+

Rating

★ 4.0

Контур.Плагин icon

Контур.Плагин

kontur.extension

Расширение браузера, выполняющее криптографические операции в сервисах СКБ Контур

Installs

1.0M+

Rating

★ 3.3

User-Agent Switcher for Chrome icon

User-Agent Switcher for Chrome

Chrome Enterprise Team

Spoofs & Mimics User-Agent strings.

Installs

1.0M+

Rating

★ 3.9

影刀RPA icon

影刀RPA

sanco1987

影刀Chrome自动化插件

Installs

1.0M+

Rating

★ 3.4

Vue.js devtools icon

Vue.js devtools

vuejs-dev

DevTools browser extension for Vue.js

Installs

1.0M+

Rating

★ 4.1

Redux DevTools icon

Redux DevTools

Redux DevTools

Redux DevTools for debugging application's state changes.

Installs

1.0M+

Rating

★ 4.6