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Find out why some Firefox add-ons might not be working on certain websites and explore solutions. Learn about the feature we introduced to manage these add-ons effectively and enhance your browsing experience.

Mozilla maintains an open ecosystem for add-ons, which gives developers many choices in how they create, use, and deploy their work. This same openness also provides malicious actors more opportunities as well. While Mozilla can identify and block malicious add-ons discovered through tooling, reviews, or user reports, this is not always enough. [[Image:Extensions panel with warning about add-ons not allowed on the site|width=450]] [[Find what version of Firefox you are using|Firefox version]] 115 introduced Quarantined Domains to protect our users' privacy and security when we discover significant security issues presented by malicious actors. This feature allows us to prevent attacks by malicious actors targeting specific domains when we have reason to believe there may be malicious add-ons we have not yet discovered. Users can also control this behavior for each add-on in the Add-on Manager (''about:addons'') starting with [[Find what version of Firefox you are using|Firefox version]] 116. We will be further improving the UI for users in future releases. =How can I re-enable the add-ons that are not allowed on sites restricted by Mozilla?= 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 add-ons disallowed on a site by Mozilla, you can do it from the [[Configuration Editor for Firefox|configuration editor]] (''about:config''): {warning}'''Warning:''' Changing advanced preferences in the configuration editor can affect Firefox's stability and security. This is recommended for advanced users only.{/warning} #[[Template:aboutconfig]] #Search for the {pref extensions.quarantinedDomains.enabled} preference. #In the type of pref section, select '''Boolean'''. #Click the '''+''' sign next to the pref to create it. #Click the ''Toggle'' [[Image:Fx71aboutconfig-ToggleButton]] button next to this preference to change its value to {pref false}. #Restart Firefox.