KJS Email Tracker 作者： Sumit Sharma

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)