![](https://addons.mozilla.org/user-media/addon_icons/2750/2750024-64.png?modified=ec5db37f)
Duplicate Tabs Closer
Enabling active mode on this add-on prevents duplicate tabs from being opened. Enabling passive mode on this add-on allows you to view the duplicate tabs in the popup UI and close the ones you don't want.
![](https://addons.mozilla.org/user-media/previews/thumbs/269/269100.jpg?modified=1651558832)
What is Duplicate Tabs Closer?
Duplicate Tabs Closer is a Firefox add-on that prevents duplicate tabs from being opened. It offers options to automatically close duplicate tabs, update badge icons, and customize tab behaviors.
Add-on stats
By: matetoes
Rating: 4.00
(2)
Creation date: 2022-05-02
Weekly download count: 7
Firefox on Android: No
Risk impact: Moderate risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
Permissions:
- cookies
- tabs
- webNavigation
- storage
- contextualIdentities
Size: 665.59K
Ranking
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Not available on Edge
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Add-on summary
NOTE: this is a fork of the original Duplicate Tabs Closer with one minor change: the addition of the Alt+Shift+D shortcut (see the bottom of the description).
★ "On duplicate tab detected" options:
- Close tab automatically: automatically closes the detected duplicate tab.
- Do nothing: monitor tabs and update the badge icon to indicate the number of duplicate tabs detected.
★ On remaining tab options (used with "Close tab automatically):
- Do nothing (default): nothing is done after the duplicate tab is closed.
- Activate: once the duplicate tab is closed, the remaining tab is activated.
- Apply opening tab behavior: once the duplicate tab is closed, depending on the default tab behavior, the remaining tab will be moved to the position of the closed tab and activated if needed.
★ Whitelist (used with "Close tab automatically): List of urls to not close automatically. Duplicate tabs detected will be notified in badge. Wildcards is supported.
User reviews
by hacKim, 2023-10-03
Add-on safety
Risk impact
Duplicate Tabs Closer may not be safe to use and it requires some risky permissions. Exercise caution when installing this add-on. Review carefully before installing.
Risk likelihood
Duplicate Tabs Closer has earned a fairly good reputation and likely can be trusted.
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