Who should use Duplicate Tab Detector?

Duplicate Tab Detector is a consumer product built for firefox users who manage many open tabs.

Does Duplicate Tab Detector have a free plan?

Yes — Duplicate Tab Detector is free to use.

What platforms does Duplicate Tab Detector run on?

Duplicate Tab Detector runs on the web and embeddable surfaces.

Is Duplicate Tab Detector still active?

Unverified. Duplicate Tab Detector has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to Duplicate Tab Detector?

Similar projects tracked by PulseGate include Duplicate Tab Closer, Duplicate Finder, and Duplicate Tab.

Who develops Duplicate Tab Detector?

Duplicate Tab Detector is developed by lpelov.

When did Duplicate Tab Detector launch?

Duplicate Tab Detector first shipped in 2024.

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Duplicate Tab Detector

Name: Duplicate Tab Detector
Author: lpelov

mozilla.orgBrowser DevTools & extensions

Duplicate Tab Detector is a Firefox extension that detects duplicate tabs across all open browser windows. It provides a list for manual cleanup, one-click or automatic closing, and URL-pattern exclusions.

FreeWebEmbeddable

Visit mozilla.org

2alternatives

6features

2024since

Overview

6 features

Duplicate Tab Detector is a Browser DevTools & extensions project. It focuses on removing duplicate browser tabs and reducing tab clutter across multiple Firefox windows. It is built as a consumer product for firefox users who manage many open tabs. Duplicate Tab Detector is free to use. It runs on the web and embeddable surfaces.

lpelov builds and maintains Duplicate Tab Detector, and it first shipped in 2024. Among its 6 catalogued features are real-time detection, cross-window scanning, and one-click closing. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

Real-time detection
Cross-window scanning
One-click closing
Auto-close duplicates
URL exclusions
Duplicate list

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed10 Sept · 04:05 UTC
Duplicate Tab Detector verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Duplicate Tab Detector

What is Duplicate Tab Detector?: Duplicate Tab Detector focuses on removing duplicate browser tabs and reducing tab clutter across multiple Firefox windows. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Duplicate Tab Detector?: Duplicate Tab Detector is a consumer product built for firefox users who manage many open tabs.
Does Duplicate Tab Detector have a free plan?: Yes — Duplicate Tab Detector is free to use.
What platforms does Duplicate Tab Detector run on?: Duplicate Tab Detector runs on the web and embeddable surfaces.
Is Duplicate Tab Detector still active?: Unverified. Duplicate Tab Detector has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to Duplicate Tab Detector?: Similar projects tracked by PulseGate include Duplicate Tab Closer, Duplicate Finder, and Duplicate Tab.Duplicate Tab Closer Duplicate Finder Duplicate Tab
Who develops Duplicate Tab Detector?: Duplicate Tab Detector is developed by lpelov.
When did Duplicate Tab Detector launch?: Duplicate Tab Detector first shipped in 2024.

At a glance

Pricing: Free
Platforms: Web
Built for: Firefox users who manage many open tabs
Model: B2C
Solves: Removing duplicate browser tabs and reducing tab clutter across multiple Firefox windows.

Registered as

Firefox Add-ons: duplicate-tab-detector

Developer

lpelov

Index record

Indexed: 10 Sept 2026
Lifecycle: Alive
Last seen: 10 Sept 2026

Identity audit (13)

Slug: duplicate-tab-detector-mozilla-org
Lifecycle state recorded: 10 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 10 Sept 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 10 Sept 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/duplicate-tab-detector

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