# Close New Duplicate Tabs

> Closes a newly created tab if tab with the same URL is already open. Does not destroy your old tabs if you accidentally open a duplicate URL.

Canonical page: [https://chrome-stats.com/d/close-new-duplicate-tabs](https://chrome-stats.com/d/close-new-duplicate-tabs)

## Overview

- **ID:** `close-new-duplicate-tabs`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Sunfur
- **Category:** tabs
- **Daily users:** 132
- **Weekly downloads:** 1
- **Rating:** 5.00 / 5 (5 ratings)
- **Version:** 2.1
- **Last updated:** 2026-03-02
- **First published:** 2025-11-09
- **Size:** 17 KB
- **Data as of:** 2026-09-14
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/close-new-duplicate-tabs/)
- **Website:** [https://github.com/sonnenfell/firefox-new-duplicate-tab-closer](https://github.com/sonnenfell/firefox-new-duplicate-tab-closer)

## Description

This open-source extension helps you to stop accidentally opening the same webpage twice and cluttering your tabs bar.
It automatically detects and closes a newly created tab if its URL is already open in another tab, reducing memory usage and keeping your tab bar clean.

Unlike other extensions with similar functionality, this one works on newly created tabs, meaning that you wont lose tabs with history. It still enables you to close all duplicate tabs through the context menu if you have some left over, though.

This extensions behaviour can also be customized extensively in the extension options - if you want it to, it can even ignore search strings in URLs for duplicate checking or redirect your focus when a duplicate gets closed.

## Rankings

- #10,249 — Overall
- #53 — close
- #129 — new tabs
- #157 — new tab
- #196 — education
- #214 — catalog

## Permissions and access

### Permissions

- `tabs`
- `storage`
- `menus`

## Safety

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

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- 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).

## Similar extensions and apps

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- [Duplicate Tab Detector](https://chrome-stats.com/d/duplicate-tab-detector) — 355 users, 4.78 / 5
- [Smart Prevent Duplicate Tabs](https://chrome-stats.com/d/smart-prevent-duplicate-tabs) — 349 users, 4.00 / 5
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- [Tabs De Clutter](https://chrome-stats.com/d/tabs-de-clutter)
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- [Duplicate Tab Manager](https://chrome-stats.com/d/duplicate-tab-manager) — 9 users, 1.00 / 5
- [Duplicate Tabs Closer](https://chrome-stats.com/d/duplicate-tabs-closer) — 7,507 users, 4.48 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/close-new-duplicate-tabs)