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PerfDebugger - Frontend Performance

Chrome extension by karmesi · Productivity · Developer

A Chrome extension in Productivity · Developer with 7 users, barely installed.

Every site you visit. This extension can read and change the content of any page you open.

What the developer says, and 3 screenshots

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

Users
7
Rating
not rated yet
Users, last 15 days
+1
Version
0.1.0
Updated in the store
2026-04-21
Published
2026-04-21
Manifest
V3
Browser access
3 permissions, 1 site pattern

How it has moved

Users
+1 since 01.09
5-7 · 10 readings
  1. 2026-09-016
  2. 2026-09-025
  3. 2026-09-036
  4. 2026-09-045
  5. 2026-09-056
  6. 2026-09-065
  7. 2026-09-086
  8. 2026-09-095
  9. 2026-09-136
  10. 2026-09-157
Users
+1 since 01.09
5-7 · 10 readings
  1. 2026-09-016
  2. 2026-09-025
  3. 2026-09-036
  4. 2026-09-045
  5. 2026-09-056
  6. 2026-09-065
  7. 2026-09-086
  8. 2026-09-095
  9. 2026-09-136
  10. 2026-09-157

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

Every site you visit. This extension can read and change the content of any page you open.

  • Act on the current tab, but only after you click it activeTab
  • Schedule work to run later alarms
  • Store data in your browser storage

The full permission history for this extension

What changed recently

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

The publisher

karmesi.

Like this one

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

  1. Realtime Profiler Describes nearly the same job, smaller audience 22 users ★ 5.0
  2. PerfLens Describes nearly the same job, smaller audience 3 users
  3. WebPerf Labs – Web Performance Analyzer Describes nearly the same job, smaller audience 166 users ★ 5.0
  4. DevPulse Describes nearly the same job, smaller audience 14 users
  5. Web Vitals Monitor Describes nearly the same job, smaller audience 12 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.