Duplicate Tabs Closer

Name: Duplicate Tabs Closer
Rating: 4.4603 (126 reviews)
Author: Peuj

By: Peuj

Detects and automatically closes duplicate tabs.

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Features & Capabilities

Duplicate Tabs Closer is a powerful Chrome extension designed to detect and automatically close duplicate browser tabs to keep your workspace organized and efficient. It offers customizable detection settings such as ignoring URL case, 'www' prefixes, and URL parts like hash or search queries. Users can define whitelist URLs and set tab priority rules to decide which duplicates to keep. The extension supports various scopes including active windows or all windows, as well as container-aware detection.

With options to automatically close duplicates, activate remaining tabs, or apply tab behavior after closing, this extension maximizes your control over tab management. It also features customizable badge colors to indicate the number of duplicates and supports a hotkey (Alt+Shift+W) to close all duplicate tabs quickly. Whether you want silent cleaning or notification-based monitoring, Duplicate Tabs Closer streamlines your browsing experience effectively.

User Growth & Download Statistics

Add-on

By:

Peuj

Daily users:

7,391 84

Rating:

4.46

(126)

Version:

4.2.6 Last updated: 2026-06-16

Version code:

6309994

Creation date:

2013-01-20

Risk:

Permissions:

tabs
tabHide
webNavigation
storage
contextualIdentities
sessions

Size:

800.04KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-20

Compare stats and ranking:

Ranking

# 927 ▲ 7

Other rankings

#67 in Tabs

#7 in close keyword 21 ▲ 1

#35 in catalog keyword 7

#37 in education keyword 10

#44 in category keyword 23

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For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Peuj

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/duplicate-tabs-closer/

Website:

https://github.com/Peuj/duplicate-tabs-closer/issues

Permission Change History

2026-06-17: Version 4.2.4 → 4.2.6

Add Permissions: tabHide

2026-06-01: Version 3.5.3 → 4.1.1

Add Permissions: sessions

Remove Permissions: cookies

User Reviews

Users generally praise the add-on for effectively reducing tab clutter and boosting productivity, with simple and useful features like filters and the option to delete newer duplicates. However, reliability is a common concern, especially across multiple windows and different machines, plus occasional false positives that close non-duplicates (including local IP tabs). UI clarity and the semantics of what counts as a duplicate are also recurring topics, along with a request for better localization. Overall, solid functionality tempered by reliability and UX caveats.

Pros

Generally works well and reduces tab clutter, with reviewers noting a clear productivity improvement.
Simple, straightforward, and effective to use.
Helpful features like filters to tailor deduping and the option to delete newer duplicates.
Some reviewers praised it highly, including comments like "Excellent add on!" and "Absolutely excellent. 10/10.", reflecting strong user satisfaction.
The ability to automatically close older duplicates when a new duplicate opens was highlighted as a desirable option.

Cons

Inconsistent reliability across windows and devices; reports that it often only works in one window or not at all after moving to another PC.
It can close non-duplicates, including local network tabs or basic local IPs (false positives).
UI/UX can be confusing, especially around the close controls and what the "close all" function does.
There is confusion about what constitutes a duplicate (some users expect exact URL matches, not domain-based duplicates).
Localization support is lacking (Polish language support mentioned as absent).

Recent reviews

4.1.5に更新した所、保存したセッションを開いて、さらに同一タブを開いたときに重複を検知できなくなった。 4.2.1 で治ってることを確認した。修正お疲れ様です

by ka*****, 2026-06-09

Works really well. You can configure it to ignore certain parts of the URL like after the search (?) part or hash (#) part of the URL as some sites will generate duplicate tabs with these parts different.

by B *****, 2026-05-26

by Fi*****, 2026-01-25

View all user reviews ›

Is Duplicate Tabs Closer Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Duplicate Tabs Closer requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

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

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Duplicate Tabs Closer is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******