What were you trying to do that didn't work?

Configure Firefox enterprise policies using the steps documented upstream:

https://support.mozilla.org/en-US/kb/customizing-firefox-using-policiesjson

What is the impact of this issue to you?

Enterprise customers who rely on Firefox's policies functionality to meet their security requirements, or to preconfigure the browser to be usable in their environment (proxy settings etc) will be unable to do so. 

This worked with rpm-packaged Firefox on RHEL 9 and all previous releases. It does not work with Flatpak Firefox on RHEL 10 Beta. 

Please provide the package NVR for which the bug is seen:

128.2.0

How reproducible is this bug?:

Every time

Steps to reproduce

1. Create /etc/firefox/policies/policies.json with the following contents:

{
  "policies": {
    "BlockAboutConfig": true
  }
}

1. Launch Firefox
2. Navigate to about:config

Expected results

1. about:config }}{{should be blocked.
2. {{about:policies should show that the BlockAboutConfig policy has been set to 'true'. }}

Actual results

1. about:config is reachable
2. about:policies says "The Enterprise Policies service is inactive."