# KJS Email Tracker

> Tracks if your emails are opened by injecting a tracking pixel.

Canonical page: [https://chrome-stats.com/d/kjs-email-tracker](https://chrome-stats.com/d/kjs-email-tracker)

## Overview

- **ID:** `kjs-email-tracker`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Sumit Sharma
- **Category:** web-development,privacy-security,social-communication
- **Daily users:** 7
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.0
- **Last updated:** 2025-06-25
- **First published:** 2025-06-22
- **Size:** 17 KB
- **Data as of:** 2026-09-14
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/kjs-email-tracker/)
- **Website:** [https://github.com/Doofenshmirtz16/Firefox-Mail-Track-Extension/tree/main](https://github.com/Doofenshmirtz16/Firefox-Mail-Track-Extension/tree/main)

## Description

Track whether your emails are opened using a Firefox extension and a Cloudflare Worker backend.

✨ Features
🔍 Automatically inserts a unique invisible tracking pixel in Gmail
🧠 Uses two ID system (system-generated + user-facing ID) for reliability
📦 Cloudflare KV logs open events with timestamps and user agents
🇮🇳 Timestamps shown in IST for relevance
📊 Detailed dashboard showing opens, metadata, and export to CSV
📋 Extension popup shows latest email tracking summary
🧼 Filters out Gmail image proxy prefetch to reduce false positives
🔁 Automatically reinjects removed tracking pixels
🌐 Deployable on any Cloudflare Worker and compatible with modern Firefox
🧱 Tech Stack
Firefox WebExtension (JavaScript, Manifest V3)
Cloudflare Workers & KV storage
HTML/CSS (Dashboard + Popup UI)

## Rankings

- #38,862 — Overall

## Permissions and access

### Permissions

- `storage`
- `activeTab`
- `scripting`

### Host permissions

- `https://mail.google.com/*`
- `https://email-tracker-worker.doofenshmirtz17.workers.dev/*`

### Content script matches

- `mail.google.com`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Request access to the following domains: google.com, workers.dev
- 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).

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