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Focus Scope - Smart Website Blocker

Chrome extension by Yukihiro Marui · Productivity · Tools

A Chrome extension in Productivity · Tools with 13 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 5 screenshots

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

Users
13
Rating
not rated yet
Users, last 15 days
+1
Version
1.2.0
Updated in the store
2026-09-08
Published
2026-03-11
Manifest
V3
Browser access
5 permissions, 2 site patterns

How it has moved

Users
+1 since 01.09
11-14 · 7 readings
2026-09-08: released 1.2.0
  1. 2026-09-0112
  2. 2026-09-0613
  3. 2026-09-0712
  4. 2026-09-0814released 1.2.0
  5. 2026-09-0913
  6. 2026-09-1311
  7. 2026-09-1513
Users
+1 since 01.09
11-14 · 7 readings
2026-09-08: released 1.2.0
  1. 2026-09-0112
  2. 2026-09-0613
  3. 2026-09-0712
  4. 2026-09-0814released 1.2.0
  5. 2026-09-0913
  6. 2026-09-1311
  7. 2026-09-1513

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.

  • See the address and title of every tab you have open tabs
  • Block or redirect requests by rules it declares in advance declarativeNetRequest
  • See when you navigate between pages webNavigation
Show the remaining 2
  • Schedule work to run later alarms
  • Store data in your browser storage

The full permission history for this extension

Version history

  1. Version 1.2.0

What changed recently

  1. Package size changed
  2. Released version 1.2.0 (was 1.1.0)

The publisher

Yukihiro Marui publishes 2 listings we track, 990 users between them.

  1. Library Check for Zotero – Prevent Duplicates Yukihiro Marui · Productivity · Tools · published 2026-02-25 977 users ★ 5.0

Like this one

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

  1. Focus Mode – Website Blocker Describes nearly the same job, smaller audience 4 users ★ 5.0
  2. Monk Mode - Website Blocker Describes nearly the same job, smaller audience 28 users
  3. Focus Tracker - Website Blocker and Focus Timer Describes nearly the same job, smaller audience 4 users ★ 5.0
  4. BlockAid: Website Blocker Describes nearly the same job, smaller audience 66 users ★ 3.0
  5. SiteBlocker — Focus & Website Blocker Describes nearly the same job, smaller audience 6 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.

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.