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Gem DevTools

Chrome extension by 594mantou · Productivity · Developer

  • Featured
  • Established publisher

A Chrome extension in Productivity · Developer with 67 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 1 screenshot

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

Users
67
Rating
not rated yet
Users, last 15 days
-7
Version
2.2.11
Updated in the store
2026-09-13
Published
2020-10-30
Manifest
V3
Browser access
No permissions declared

How it has moved

Users
-7 since 31.08
67-74 · 9 readings
2026-09-08: released 2.2.102026-09-14: released 2.2.11
  1. 2026-08-3174
  2. 2026-09-0471
  3. 2026-09-0570
  4. 2026-09-0768
  5. 2026-09-0869released 2.2.10
  6. 2026-09-0968
  7. 2026-09-1069
  8. 2026-09-1367
  9. 2026-09-1467released 2.2.11
Users
-7 since 31.08
67-74 · 9 readings
2026-09-08: released 2.2.102026-09-14: released 2.2.11
  1. 2026-08-3174
  2. 2026-09-0471
  3. 2026-09-0570
  4. 2026-09-0768
  5. 2026-09-0869released 2.2.10
  6. 2026-09-0968
  7. 2026-09-1069
  8. 2026-09-1367
  9. 2026-09-1467released 2.2.11

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

Version history

  1. Version 2.2.11
  2. Version 2.2.10

What changed recently

  1. Released version 2.2.11 (was 2.2.10)
  2. Released version 2.2.10 (was 2.2.9)

The publisher

594mantou publishes 5 listings we track, 6k users between them.

  1. SLyrics 594mantou · Lifestyle · Entertainment · published 2020-01-08 5k users ★ 4.5
  2. Netease Cloud Music Search 594mantou · Productivity · Tools · published 2020-09-16 543 users ★ 5.0
  3. Browser for AI Agent 594mantou · Productivity · Tools · published 2026-06-02 24 users
Show 1 more from this publisher
  1. StockIcon 594mantou · Lifestyle · News · published 2025-10-17 audience not published

Like this one

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

  1. Gemini Shared Gems Manager Describes nearly the same job, smaller audience 8 users
  2. Gems Manager for Gemini Describes nearly the same job, smaller audience 12 users
  3. Gems Manager for Google Gemini Describes nearly the same job, smaller audience 909 users ★ 5.0
  4. Easy devtools Describes nearly the same job, smaller audience 8 users
  5. Opal DevTools Describes nearly the same job, smaller audience 48 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?

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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.