Duplicate Tab Detector

by Ian Gordon · Tools

Manifest V3 Free

View in Chrome Web Store Data as of 19 Oct 2026

Detects when a URL is already open and shows an in-page banner with options. No notifications permission requested.

Users

+1 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#250K

#209K among extensions

Version

1.0.1

updated 30 Sep 2025

Users

monthly, 13 months

Latest, 19 Oct 2026: 5 usersMove the mouse over the chart for any month

Ratings count

monthly, 13 months

Latest, 19 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Duplicate Tab Detector

Tired of opening the same website multiple times? Duplicate Tab Detector helps you stay organized by detecting when you open a tab with a URL that is already open elsewhere in Chrome. ✨ Features - Instantly detects duplicate tabs in your browser - Alerts you with a clear, actionable notification - Lets you decide whether to keep the new tab or close the old one - Works across all Chrome windows 🔒 Why use it? - Reduce clutter in your browser - Save memory and CPU by avoiding duplicate pages - Stay focused and productive with fewer redundant tabs Simple, lightweight, and privacy-friendly, your browsing data never leaves your device.