Starting Firefox 115, Mozilla has introduced a new security feature, named “Quarantined Domains. This feature aims to improve privacy and security by preventing some extensions from running on certain websites. When affected extensions are blocked, the Extensions panel displays the message “Some extensions are not allowed”. Here is how to disable this message and re-allow affected extensions on specific websites again.
Quarantined Domains
Mozilla has the ability to identify and block malicious extensions based on reviews, and user reports in the Firefox browser. They take extensions security very seriously, but that’s not sufficient.
With Firefox version 115, Mozilla has implemented the “Quarantined Domains” to protect user privacy and security when it discovers significant security issues are detected involving malicious actors.
When Mozilla determines that certain add-ons are targetting specific domains, it blocks the extensions and denies “read and change data Permission” on the specific websites.
When you click the Extensions icon, you’ll notice the message “Some extensions are not allowed” in the Extensions panel on the affected website.
The message reads, “Only some extensions monitored by Mozilla are allowed on this site to protect your data.”.
Read: Mozilla says “This Extension isn’t Monitored” Warning shown to Users on AMO is a Test
Behind the scenes, Mozilla maintains a list of Quarantined domains in Firefox, that can be remotely updated by Mozilla. When Firefox detects such a site, you’ll notice extensions are unable to read and change data on that website.
It is important to note that this is a security feature Mozilla has applied for your safety.
However, if you’re confident that the extension has good reviews in AMO and is not malicious, you can disable this message.
Disable Firefox’s ‘Some extensions are not allowed message
- Launch Firefox
- visit about:config
- Find
extensions.quarantinedDomains.enabledpreference and change its value to false
extensions.quarantinedDomains.enabled pref - Restart Firefox.
If the preference doesn’t exist you can paste it into the search field, when it shows up, select boolean to create a preference.
what’s your take on this? Is any one of your extensions affected in Firefox 115? Let us know in the comments below
Final words: Mozilla has introduced a “Quarantined domains” back-end feature in Firefox 115. This feature may not allow some extensions to read and change data on specific websites. The issue can be fixed by toggling about config pref.
Be noted that, according to [https://lapcatsoftware.com/articles/2023/7/3.html]
“”Mozilla has already published a remote update to extensions.quarantinedDomains.list, which you can now see in Firefox on the about:config page (unless you’ve toggled extensions.quarantinedDomains.enabled or blocked network connections to firefox.settings.services.mozilla.com)”
This means that preventing Firefox (115+) from accessing [firefox.settings.services.mozilla.com] will prevent the remote update of the Quarantined Domains list as well.