# Trocker

> This extension is an email Tracker Blocker, hence the name: Trocker!

Canonical page: [https://chrome-stats.com/d/trockerapp](https://chrome-stats.com/d/trockerapp)

## Overview

- **ID:** `trockerapp`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Trocker Team
- **Category:** privacy-security
- **Daily users:** 1,731
- **Weekly downloads:** 34
- **Rating:** 4.71 / 5 (35 ratings)
- **Version:** 3.4.1
- **Last updated:** 2026-07-10
- **First published:** 2018-12-10
- **Size:** 103 KB
- **Data as of:** 2026-09-13
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/trockerapp/)
- **Website:** [https://trockerapp.github.io/](https://trockerapp.github.io/)

## Description

Trocker is a powerful Chrome extension designed to protect your email privacy by blocking email trackers. Many emails contain invisible tracking images or tracked links that notify senders when you open or interact with their messages. Trocker stops these tracking attempts by locally blocking requests for tracking images and bypassing tracked links without sending any data to the internet. 

Compatible with popular webmail services like Gmail, Yahoo, and Outlook, Trocker even offers advanced heuristic detection in Gmail, Inbox, and Outlook to block nearly all trackers, including unknown ones. It runs efficiently, activating only when trackers are detected, and is fully open source to ensure transparency and trust. With Trocker enabled, no sender can know when you open their emails or click their links, giving you complete control over your email privacy.

## Rankings

- #2,432 — Overall
- #6 — rocket
- #63 — mock
- #75 — tracker
- #94 — receive
- #116 — ad blocker

## Permissions and access

### Permissions

- `declarativeNetRequest`
- `declarativeNetRequestFeedback`
- `declarativeNetRequestWithHostAccess`
- `storage`

### Host permissions

- `<all_urls>`
- `*://*.google.com/*`
- `*://*.live.com/*`
- `*://*.googleusercontent.com/*`

### Content script matches

- `mail.google.com`
- `inbox.google.com`
- `*.mail.live.com`
- `*.outlook.live.com`
- `*.outlook.office365.com`
- `*.outlook.office.com`
- `*.outlook.cloud.microsoft`
- `*.mail.yahoo.com`

## Safety

- **Risk impact:** Very high risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

Users appreciate Trocker for effectively blocking email trackers and improving privacy, especially on Gmail. It restores a sense of freedom by stopping invasive tracking. However, multiple users report issues with unnecessary blocking of images that remain unresolved for months. There is also demand for expanding support to other email providers like mail.ru and yandex.ru. Overall, the add-on is seen as a helpful and necessary privacy tool with room for improvement.

### Pros

- Effectively blocks invasive trackers in emails, enhancing user privacy.
- Works well with popular email services like Gmail.
- Provides users with a sense of regained freedom and control over their email privacy.
- Appreciated as a helpful and necessary tool for email privacy.

### Cons

- Occasionally blocks certain images unnecessarily, causing user inconvenience.
- Some reported issues have persisted for months without resolution.
- Feature requests for supporting additional email providers like mail.ru and yandex.ru have been made.

## Similar extensions and apps

- [Email Tracker Blocker](https://chrome-stats.com/d/email-tracker-blocker) — 22 users
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- [Block Mailtrack](https://chrome-stats.com/d/block-mailtrack) — 211 users, 5.00 / 5
- [Pixel Tracker Blocker](https://chrome-stats.com/d/pixel-tracker-blocker) — 38 users, 1.00 / 5
- [Email Tracker Blocker 12](https://chrome-stats.com/d/email-tracker-blocker-12) — 1 users
- [whospies-email-tracker-blocker](https://chrome-stats.com/d/whospies-email-tracker-blocker) — 4 users
- [Invisible Tracker Blocker](https://chrome-stats.com/d/invisible-tracker-blocker) — 4 users
- [Email Tracker for Firefox](https://chrome-stats.com/d/email-tracker-for-firefox) — 99 users, 2.00 / 5
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- [Fire-Track](https://chrome-stats.com/d/fire-track) — 1 users
- [Mail Tracker Pro](https://chrome-stats.com/d/mail-tracker-pro) — 189 users
- [Email Tracker](https://chrome-stats.com/d/email_tracker) — 1,551 users, 2.36 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/trockerapp)