Tracker Blocker: Stop trackers in emails
Chrome extension by GMass, Inc. · Productivity · Workflow
- Established publisher
- Trader
A Chrome extension in Productivity · Workflow with 7 000 users, a small but real audience. Audience over the last 30 days: unchanged.
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
- 7 000
- Users, last 30 days
- Unchanged (the store rounds this count to 1 000, so it moves only between steps)
- Rating, last 30 days
- Steady over 30 days
- Version
- 2.0.1
- Updated in the store
- 2025-12-15
- Published
- 2022-01-25
- Manifest
- V3
- Browser access
- 4 permissions
How it has moved
- 2026-11-027k
- 2026-11-02reviews12
- 2026-09-017k
- 2026-11-027k
- 2026-09-01reviews12
- 2026-11-02reviews12
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.
-
Block or redirect requests by rules it declares in advance
declarativeNetRequest -
See which of its blocking rules matched
declarativeNetRequestFeedback -
Show you notifications
notifications
Show the remaining 1
-
Store data in your browser
storage
What changed recently
Nothing has moved on this listing since we started watching it.
The publisher
GMass, Inc. publishes 2 listings we track, 407k users between them. Listed website: gmass.co.
-
GMass: Powerful mail merge for Gmail 400k users
Like this one
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Gmail Tracker Shield 7 users
-
Mailshade — Email Tracker Blocker 33 users
-
Email Tracker de MailBolt™ 16 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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Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.
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.
[](https://extops.dev/extensions/okacfeiojkgmcaonaikblpicellplcdn)<a href="https://extops.dev/extensions/okacfeiojkgmcaonaikblpicellplcdn"><img src="https://extops.dev/extensions/okacfeiojkgmcaonaikblpicellplcdn/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 has not changed these figures since 2026-09-01, when we first saw this listing. We publish no contact details for extension developers.