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Chrome extension by Fumihiko Takayama · Productivity · Developer

A Chrome extension in Productivity · Developer with 4 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
4
Rating
not rated yet
Users, last 2 days
+4
Version
1.4.0
Updated in the store
2026-09-13
Published
2026-09-13
Manifest
V3
Browser access
6 permissions, 2 site patterns

How it has moved

Users
+4 since 14.09
0-4 · 2 readings
2026-09-14: appeared in the store
  1. 2026-09-140appeared in the store
  2. 2026-09-154
Users
+4 since 14.09
0-4 · 2 readings
2026-09-14: appeared in the store
  1. 2026-09-140appeared in the store
  2. 2026-09-154

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.

  • Read and change cookies on the sites it can access cookies
  • See the address and title of every tab you have open tabs
  • Watch the network requests your browser makes webRequest
Show the remaining 3
  • See when you navigate between pages webNavigation
  • Open a panel beside the page sidePanel
  • Store data in your browser storage

The full permission history for this extension

What changed recently

  1. Appeared in the store

The publisher

Fumihiko Takayama.

Like this one

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

  1. DevHelper Describes nearly the same job, smaller audience 2 users
  2. Better Devtools Storage Describes nearly the same job, smaller audience 6 users
  3. App State Dumper Describes nearly the same job, smaller audience 37 users
  4. Storage Manager Describes nearly the same job, smaller audience 16 users ★ 5.0
  5. Dev Store Scrub Describes nearly the same job, smaller audience 17 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.

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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.