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Co:Writer

Chrome extension by Don Johnston Incorporated · Make Chrome Yours · Accessibility

  • Trader

A Chrome extension in Make Chrome Yours · Accessibility with 1 000 000 users, one of the largest listings in the store.

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
1 000 000
Rating
2.8 (82 ratings)
Users, last 9 days
+1M
Rating, last 30 days
Not watched long enough to say
Version
5.0.10.844
Updated in the store
2025-12-09
Published
2014-09-04
Manifest
V3
Browser access
9 permissions, 2 site patterns

How it has moved

Users
+1M since 01.09
0-1M · 4 readings
  1. 2026-09-010
  2. 2026-09-021M
  3. 2026-09-070
  4. 2026-09-091M
Rating
unchanged since 01.09
reviewsrating 2.77 · 4 readings
  1. 2026-09-01reviews82rating2.77
  2. 2026-09-02reviews82rating2.77
  3. 2026-09-07reviews82rating2.77
  4. 2026-09-09reviews82rating2.77
Users
+1M since 01.09
0-1M · 4 readings
  1. 2026-09-010
  2. 2026-09-021M
  3. 2026-09-070
  4. 2026-09-091M
Rating
unchanged since 01.09
reviewsrating 2.77 · 4 readings
  1. 2026-09-01reviews82rating2.77
  2. 2026-09-02reviews82rating2.77
  3. 2026-09-07reviews82rating2.77
  4. 2026-09-09reviews82rating2.77

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
  • Watch the network requests your browser makes webRequest
  • Run its own code on the pages it can access scripting
Show the remaining 6
  • See when you navigate between pages webNavigation
  • Add items to the right-click menu contextMenus
  • Show you notifications notifications
  • Run work in a hidden page offscreen
  • Store data in your browser storage
  • Store data in your browser without the usual size limit unlimitedStorage

The full permission history for this extension

What changed recently

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

The publisher

Don Johnston Incorporated publishes 5 listings we track, 2.0M users between them. Listed website: cowriter.com.

  1. Snap&Read Don Johnston Incorporated · Make Chrome Yours · Accessibility · published 2015-02-17 1.0M users ★ 2.6
  2. Word Bank Don Johnston Incorporated · Productivity · Workflow · published 2017-03-31 0 users ★ 4.4
  3. Quizbot Don Johnston Incorporated · Productivity · Workflow · published 2018-03-16 0 users ★ 3.0
Show 1 more from this publisher
  1. Co:Writer Universal (App) Don Johnston Incorporated · published 2014-09-04 0 users ★ 2.7

Like this one

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

  1. SkrivaText Describes nearly the same job, with a large installed audience 300k users ★ 3.7
  2. WordFlow — AI Writing Assistant Describes nearly the same job 0 users ★ 5.0
  3. Write Lens: Grammar & Spell Checker Describes nearly the same job, smaller audience 6 users ★ 5.0
  4. CorrectEnglish Describes nearly the same job, smaller audience 240 users
  5. Spelling Corrector Describes nearly the same job, smaller audience 4 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.