Why are some add-ons not allowed on sites restricted by Mozilla?

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  • Revision id: 261512
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  • Creator: Lucas Siebert
  • Comment: Resized the screenshot added by Will
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  • Reviewed by: lsiebert
  • Is approved? Yes
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  • Readied for localization by: lsiebert
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Certain Firefox users may come across a message in the extensions panel indicating that their add-ons are not allowed on the site currently open. As of Firefox version 115, we have introduced a new back-end feature to only allow some extensions monitored by Mozilla to run on specific websites for various reasons, including security concerns.

Extensions panel with warning about add-ons not allowed on the site

Our team is working continuously to develop this functionality and to provide users the ability to manage these restrictions for each individual add-on in the future.

How can I re-enable the add-ons that are not allowed on some websites?

We understand that installing add-ons is a user choice and, as with your security, we also take this matter very seriously. If you are aware of the associated risk and still wish to allow the add-ons that have been disallowed on a website by Mozilla, you can do it from the configuration editor:

Warning: Changing advanced preferences in the configuration editor can affect Firefox's stability and security. This is recommended for advanced users only.
  1. Type about:config into the address bar and press Enter.
  2. A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.
  3. Type extensions.quarantinedDomains.enabled
  4. In the type of pref section, select Boolean.
  5. Click the + sign next to the pref to create it.
  6. Set the pref to False.
  7. Restart Firefox.