Enter about:policies in the address bar and paste here your active policies.

What version of Firefox? What OS? I'll guess windows, what security software are you running?

Firefox 133.0.3 (64-bit) Windows 11 24H2 Norton 360

Enter about:policies in the address bar and paste here your active policies.

How about this?

You can click the "Your browser is being managed by your organization" notification or open the about:policies page via the address bar to see if policies are active and if errors are reported.

• https://support.mozilla.org/en-US/kb/see-active-policies-firefox-enterprise

Seeing the "Your browser is being managed by your organization" notification at the top of the Settings page is usually caused by security software that uses GPO policy rules or uses a policies.json file in the distribution folder in the profile folder to inject their root certificate (ImportEnterpriseRoots) in Firefox to be able to hook into your internet connection to prevent getting a connection not trusted error message.

• https://support.mozilla.org/en-US/kb/error-codes-secure-websites

Active Policy Name Policy Value Certificates ImportEnterpriseRoots true

Active Policy Name Policy Value Certificates ImportEnterpriseRoots true

This usually indicates that some third-party software, probably your security software, has set Firefox to use what it finds in the Windows certificate store to verify website SSL certificates (as a supplement to or instead of Firefox's built-in certificates). On a well-protected computer, that's okay.

If you prefer Firefox to use its default method of verifying website SSL certificates, you could search for where this policy is set. That might be either an entry in the Windows registry or a policies.json file. I suspect that if you remove it, the third party software might restore it, so I don't know whether it is worth the effort.

• Customize Firefox using Group Policy (Windows)
• Customize Firefox using policies.json