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Chrome Web Store listing by Houghton Mifflin Harcourt

A Chrome extension with 900 000 users, a widely installed extension. Audience over the last 30 days: +100 000.

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

What the developer says, and 5 screenshots

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

Users
900 000 (the store no longer states an audience; this is the last figure it published)
Rating
3.6 (31 ratings)
Users, last 30 days
+100 000
Rating, last 30 days
Steady over 30 days
Version
4.0.1
Updated in the store
2022-03-02
Published
2014-08-18
Manifest
V2
Browser access
No permissions declared

How it has moved

Users
+100k since 04.09
0-900k · 4 readings
  1. 2026-09-070
  2. 2026-09-10800k
  3. 2026-09-17900k
  4. 2026-10-04900k
Rating
unchanged since 04.09
reviewsrating 3.61 · 4 readings
  1. 2026-09-07reviews31rating3.61
  2. 2026-09-10reviews31rating3.61
  3. 2026-09-17reviews31rating3.61
  4. 2026-10-04reviews31rating3.61
Users
+100k since 31.08
0-900k · 5 readings
  1. 2026-08-31800k
  2. 2026-09-070
  3. 2026-09-10800k
  4. 2026-09-17900k
  5. 2026-10-04900k
Rating
unchanged since 31.08
reviewsrating 3.61 · 5 readings
  1. 2026-08-31reviews31rating3.61
  2. 2026-09-07reviews31rating3.61
  3. 2026-09-10reviews31rating3.61
  4. 2026-09-17reviews31rating3.61
  5. 2026-10-04reviews31rating3.61

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.

We have not read this listing's manifest since we started keeping permission names. The counts above come from the last time we did.

The full permission history for this extension

What changed recently

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

The publisher

Houghton Mifflin Harcourt.

Like this one

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

  1. Portals student Describes nearly the same job, smaller audience 2k users (last published figure) ★ 5.0
  2. Edify Digital Describes nearly the same job audience not published
  3. ClassHive Kids Describes nearly the same job, smaller audience 579 users
  4. Student.MasteryConnect.com Describes nearly the same job audience not published
  5. Hudra Describes nearly the same job, smaller audience 6 users (last published figure)

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?

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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.