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StayFocus on Canvas

Chrome extension by CanvasPreventor · Productivity · Education

A Chrome extension in Productivity · Education with 206 users, barely installed.

No site access is declared in the manifest, so it cannot read the pages you open on its own.

What the developer says, and 3 screenshots

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

Users
206
Rating
2.3 (3 ratings)
Users, last 16 days
+16
Rating, last 30 days
Not watched long enough to say
Version
1.1
Updated in the store
2023-10-20
Published
2023-10-19
Manifest
V3
Browser access
3 permissions

How it has moved

Users
+16 since 31.08
190-207 · 8 readings
  1. 2026-08-31190
  2. 2026-09-02194
  3. 2026-09-05202
  4. 2026-09-07201
  5. 2026-09-08199
  6. 2026-09-09201
  7. 2026-09-13207
  8. 2026-09-15206
Rating
unchanged since 31.08
reviewsrating 2.33 · 8 readings
  1. 2026-08-31reviews3rating2.33
  2. 2026-09-02reviews3rating2.33
  3. 2026-09-05reviews3rating2.33
  4. 2026-09-07reviews3rating2.33
  5. 2026-09-08reviews3rating2.33
  6. 2026-09-09reviews3rating2.33
  7. 2026-09-13reviews3rating2.33
  8. 2026-09-15reviews3rating2.33
Users
+16 since 31.08
190-207 · 8 readings
  1. 2026-08-31190
  2. 2026-09-02194
  3. 2026-09-05202
  4. 2026-09-07201
  5. 2026-09-08199
  6. 2026-09-09201
  7. 2026-09-13207
  8. 2026-09-15206
Rating
unchanged since 31.08
reviewsrating 2.33 · 8 readings
  1. 2026-08-31reviews3rating2.33
  2. 2026-09-02reviews3rating2.33
  3. 2026-09-05reviews3rating2.33
  4. 2026-09-07reviews3rating2.33
  5. 2026-09-08reviews3rating2.33
  6. 2026-09-09reviews3rating2.33
  7. 2026-09-13reviews3rating2.33
  8. 2026-09-15reviews3rating2.33

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

No site access is declared in the manifest, so it cannot read the pages you open on its own.

  • See the address and title of every tab you have open tabs
  • Run its own code on the pages it can access scripting
  • Act on the current tab, but only after you click it activeTab

The full permission history for this extension

What changed recently

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

The publisher

CanvasPreventor.

Like this one

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

  1. CanvasNinja – Tab Detection Blocker for Canvas Describes nearly the same job, smaller audience 471 users ★ 5.0
  2. Canvas Help Describes nearly the same job, smaller audience 20 users ★ 5.0
  3. Canvas Tab Switch Blocker | Phantom Describes nearly the same job, smaller audience 86 users
  4. QuizCloak Describes nearly the same job, smaller audience 347 users ★ 5.0
  5. Canvas Privacy Protection Describes nearly the same job, smaller audience 86 users ★ 1.0

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.