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Uptime Monitor – Keep Tabs Responsive

Chrome extension by calmcore · Productivity · Tools

A Chrome extension in Productivity · Tools with 67 users, barely installed. Audience over the last 30 days: +13.

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
67
Rating
not rated yet
Users, last 30 days
+13
Version
1.0.5
Updated in the store
2026-02-10
Published
2025-10-25
Manifest
V3
Browser access
4 permissions

How it has moved

Users
+13 since 03.10
49-78 · 17 readings
  1. 2026-10-0451
  2. 2026-10-0849
  3. 2026-10-1050
  4. 2026-10-1149
  5. 2026-10-1354
  6. 2026-10-1654
  7. 2026-10-1860
  8. 2026-10-1966
  9. 2026-10-2170
  10. 2026-10-2272
  11. 2026-10-2378
  12. 2026-10-2476
  13. 2026-10-2572
  14. 2026-10-2763
  15. 2026-10-2964
  16. 2026-11-0167
  17. 2026-11-0267
Users
+18 since 01.09
43-78 · 29 readings
  1. 2026-09-0149
  2. 2026-09-0543
  3. 2026-09-0748
  4. 2026-09-0849
  5. 2026-09-1050
  6. 2026-09-1349
  7. 2026-09-1547
  8. 2026-09-1748
  9. 2026-09-2049
  10. 2026-09-2250
  11. 2026-09-2546
  12. 2026-09-2754
  13. 2026-10-0451
  14. 2026-10-0849
  15. 2026-10-1050
  16. 2026-10-1149
  17. 2026-10-1354
  18. 2026-10-1654
  19. 2026-10-1860
  20. 2026-10-1966
  21. 2026-10-2170
  22. 2026-10-2272
  23. 2026-10-2378
  24. 2026-10-2476
  25. 2026-10-2572
  26. 2026-10-2763
  27. 2026-10-2964
  28. 2026-11-0167
  29. 2026-11-0267

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.

  • Run its own code on the pages it can access scripting
  • Schedule work to run later alarms
  • Add items to the right-click menu contextMenus
Show the remaining 1
  • Store data in your browser storage

The full permission history for this extension

What changed recently

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

The publisher

calmcore.

Like this one

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

  1. PageAutoWatch Describes nearly the same job, smaller audience 5 users
  2. Active-Page Utility Describes nearly the same job, smaller audience 53 users
  3. Uptime Guard - Website Uptime Monitor Describes nearly the same job, smaller audience 8 users ★ 5.0
  4. Page Keep-Alive Describes nearly the same job, smaller audience 2k users ★ 5.0
  5. Lucky Fetch Describes nearly the same job, smaller audience 9 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.

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Users and rating on Ext Ops Panel

Markdown

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HTML

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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