Ext Ops Panel
Open dashboard

Calculus Humor

Chrome Web Store listing by Gregory Tewksbury

  • Established publisher

A Chrome extension with 535 users, barely installed. Audience over the last 30 days: -17.

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

What the developer says, and 2 screenshots

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

Users
535
Rating
5.0 (1 ratings)
Users, last 30 days
-17
Rating, last 30 days
Steady over 30 days
Version
2.0.0
Updated in the store
2013-09-04
Published
2012-09-16
Manifest
V2
Browser access
No permissions declared

How it has moved

Users
-17 since 02.10
522-552 · 18 readings
  1. 2026-10-04536
  2. 2026-10-08545
  3. 2026-10-09537
  4. 2026-10-10534
  5. 2026-10-11533
  6. 2026-10-13530
  7. 2026-10-16537
  8. 2026-10-17534
  9. 2026-10-18535
  10. 2026-10-20534
  11. 2026-10-21528
  12. 2026-10-22533
  13. 2026-10-23525
  14. 2026-10-24522
  15. 2026-10-25524
  16. 2026-10-28531
  17. 2026-10-30539
  18. 2026-11-01535
Rating
unchanged since 02.10
reviewsrating 5.00 · 18 readings
  1. 2026-10-04reviews1rating5.00
  2. 2026-10-08reviews1rating5.00
  3. 2026-10-09reviews1rating5.00
  4. 2026-10-10reviews1rating5.00
  5. 2026-10-11reviews1rating5.00
  6. 2026-10-13reviews1rating5.00
  7. 2026-10-16reviews1rating5.00
  8. 2026-10-17reviews1rating5.00
  9. 2026-10-18reviews1rating5.00
  10. 2026-10-20reviews1rating5.00
  11. 2026-10-21reviews1rating5.00
  12. 2026-10-22reviews1rating5.00
  13. 2026-10-23reviews1rating5.00
  14. 2026-10-24reviews1rating5.00
  15. 2026-10-25reviews1rating5.00
  16. 2026-10-28reviews1rating5.00
  17. 2026-10-30reviews1rating5.00
  18. 2026-11-01reviews1rating5.00
Users
-20 since 31.08
522-577 · 32 readings
  1. 2026-08-31555
  2. 2026-09-02562
  3. 2026-09-05577
  4. 2026-09-06573
  5. 2026-09-07571
  6. 2026-09-08563
  7. 2026-09-09562
  8. 2026-09-13566
  9. 2026-09-15570
  10. 2026-09-17560
  11. 2026-09-20542
  12. 2026-09-25559
  13. 2026-09-26550
  14. 2026-09-28552
  15. 2026-10-04536
  16. 2026-10-08545
  17. 2026-10-09537
  18. 2026-10-10534
  19. 2026-10-11533
  20. 2026-10-13530
  21. 2026-10-16537
  22. 2026-10-17534
  23. 2026-10-18535
  24. 2026-10-20534
  25. 2026-10-21528
  26. 2026-10-22533
  27. 2026-10-23525
  28. 2026-10-24522
  29. 2026-10-25524
  30. 2026-10-28531
  31. 2026-10-30539
  32. 2026-11-01535
Rating
unchanged since 31.08
reviewsrating 5.00 · 32 readings
  1. 2026-08-31reviews1rating5.00
  2. 2026-09-02reviews1rating5.00
  3. 2026-09-05reviews1rating5.00
  4. 2026-09-06reviews1rating5.00
  5. 2026-09-07reviews1rating5.00
  6. 2026-09-08reviews1rating5.00
  7. 2026-09-09reviews1rating5.00
  8. 2026-09-13reviews1rating5.00
  9. 2026-09-15reviews1rating5.00
  10. 2026-09-17reviews1rating5.00
  11. 2026-09-20reviews1rating5.00
  12. 2026-09-25reviews1rating5.00
  13. 2026-09-26reviews1rating5.00
  14. 2026-09-28reviews1rating5.00
  15. 2026-10-04reviews1rating5.00
  16. 2026-10-08reviews1rating5.00
  17. 2026-10-09reviews1rating5.00
  18. 2026-10-10reviews1rating5.00
  19. 2026-10-11reviews1rating5.00
  20. 2026-10-13reviews1rating5.00
  21. 2026-10-16reviews1rating5.00
  22. 2026-10-17reviews1rating5.00
  23. 2026-10-18reviews1rating5.00
  24. 2026-10-20reviews1rating5.00
  25. 2026-10-21reviews1rating5.00
  26. 2026-10-22reviews1rating5.00
  27. 2026-10-23reviews1rating5.00
  28. 2026-10-24reviews1rating5.00
  29. 2026-10-25reviews1rating5.00
  30. 2026-10-28reviews1rating5.00
  31. 2026-10-30reviews1rating5.00
  32. 2026-11-01reviews1rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times 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

Gregory Tewksbury publishes 2 listings we track, 570 users between them. Listed website: calculushumor.com.

  1. University of Cincinnati Gregory Tewksbury · published 2014-04-01 35 users ★ 3.6

Like this one

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

  1. AI Teacher Joke Generator Describes nearly the same job, smaller audience 27 users
  2. Short Funny Joke Describes nearly the same job, smaller audience 77 users
  3. SimplyA Joke Describes nearly the same job, smaller audience 3 users
  4. Get Joke Extension Describes nearly the same job, smaller audience 14 users ★ 5.0
  5. Dad Jokes Describes nearly the same job, smaller audience 50 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.

Want this mark on your extension in our catalog?

Verify that you are its author and you can show this mark on the card, with live banners for your site and README. How verification works

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

Connect it in a minute See what the panel does
Add a badge to your README or site

The badge shows the audience and rating from our last pass over the store and links back to this page.

Users and rating on Ext Ops Panel

Markdown

[![Users and rating on Ext Ops Panel](https://extops.dev/extensions/ffdhpliedkicdacpoapobfioolmlhdij/badge.svg)](https://extops.dev/extensions/ffdhpliedkicdacpoapobfioolmlhdij)

HTML

<a href="https://extops.dev/extensions/ffdhpliedkicdacpoapobfioolmlhdij"><img src="https://extops.dev/extensions/ffdhpliedkicdacpoapobfioolmlhdij/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>

Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-11-01. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built