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Preview of Dedupe: Tab Deduplicator

Dedupe: Tab Deduplicator by Scout

Switch to existing tab instead of opening duplicate

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Extension Metadata

Screenshots
Screenshot of the Dedupe UI
About this extension
💬 Description

Dedupe is a Firefox browser extension that minimizes duplicate tabs, keeping you organized and saving some system resources. It works by scanning active tabs whenever you open a new one to check if you're navigating to a page you already have a tab for and, if it finds one, just switches to that tab instead.

✨ Features

Automatic deduplication: Detects duplicate tabs on open and handles them based on your configured behavior.

Popup with duplicate viewer: Lists current duplicate tabs so you can close them individually or all at once.

Pause toggle: Temporarily disable the extension via keybinding or popup. The icon reflects the current state.

Keybindings
- Toggle pause
- Detach the current tab (or selected tabs) into a new window

Domain whitelist/blacklist: Exclude specific domains from deduplication.

Configurable behavior
- Which navigation types trigger deduplication (new tabs, new windows, redirects, etc.)
- Whether to close the new tab or the existing one
- Whether to auto-focus the surviving tab
- URL comparison logic
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Permissions and data

Required permissions:

  • Access recently closed tabs
  • Access browser tabs

Data collection:

  • The developer says this extension doesn't require data collection.
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More information
Add-on Links
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Version
2.1
Size
296.99 KB
Last updated
4 months ago (Mar 17, 2026)
Related Categories
  • Tabs
License
The Unlicense
Version History
  • See all versions
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