Dont Open Duplicate Tabs

Dont Open Duplicate Tabs

Addon, to prevent the opening of tabs with urls, which are already opened.

Dont Open Duplicate Tabs promo image
What is Dont Open Duplicate Tabs?

Dont Open Duplicate Tabs is a Firefox add-on that prevents the opening of tabs with URLs that are already open. It offers features like enabling/disabling via the toolbar icon, whitelisting for allowing duplications of URLs, changing focus to already open tab, and disabling/enabling removal notifications.

Stats date:
Users: 48
Rating: 4.69 (13)
Version: 1.8.12 (Last updated: 2023-06-02)
Creation date: 2021-04-13
Weekly download count: 6
Firefox on Android: Yes
Manifest version: 2
  • menus
  • cookies
  • notifications
  • storage
  • tabs
Size: 19.00K
URLs: Website
Risk impact: Moderate risk impact
Risk likelihood: Moderate risk likelihood

Other platforms

Not available on Chrome
Not available on Edge

Addon, to prevent the opening of tabs with urls, which are already opened.


  • Enable/disable via the toolbar icon
  • Whitelist to allow duplications of URLs
  • Option to change focus to already open tab
  • Option to disable/enable removal notifications
  1. Permissions: This add-on tries to use the minimal number of required permissions to successfully fullfill its intended purpose. If you think this could be improved please let me know by opening an issue and i will try to look into it. More Details on the individual permission can be found here:
  2. Cost/Payment: This Add-on is and forever will be subscription and payment free to use for everyone however they like. If you are feeling generous you can send me a tip via my bitcoin address 35WK2GqZHPutywCdbHKa9BQ52GND3Pd6h4
  3. Stars/Reviews: If you found this add-on useful leave some stars or a review so others have an easier time finding it.
  4. Bugs, Suggestions or Requests:
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User reviews
Nice add-on. Only works if the duplicating tab is in the same browser's window. It would be great if the add-on can also detect duplicating tab on other window and change focus to those tab as well.
by tong+, 2023-06-02
View all user reviews
Risk impact

Dont Open Duplicate Tabs 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

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

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