"policies": {
       "AppAutoUpdate": false,
       "BackgroundAppUpdate": false,
       "DisableAppUpdate": true,
       "DisableFeedbackCommands": true,
       "DisableFirefoxAccounts": true,
       "DisableFirefoxStudies": true,
       "DisablePocket": true,
       "DisableSystemAddonUpdate": true,
       "DisableTelemetry": true,
       "ExtensionUpdate": false
   }

I start firefox with following policies.json { "policies": { "AppAutoUpdate": false, "BackgroundAppUpdate": false, "DisableAppUpdate": true, "DisableFeedbackCommands": true, "DisableFirefoxAccounts": true, "DisableFirefoxStudies": true, "DisablePocket": true, "DisableSystemAddonUpdate": true, "DisableTelemetry": true, "ExtensionUpdate": false } } But uncontrolled connections to the following addresses continue anyway: * firefox.settings.services.mozilla.com * aus5.mozilla.org I may have missed something and you can tell me how I can control these connections inclusive. Because all other connections can be controlled by configs and policies. But not these and it raises big questions. It seems to me that the browser should allow to configure any network requests that aren't related to the user web browsing itself. If some connections cannot be controlled in any way then I can't call it anything other than either a bug or an attempt to monitor users as do in Google Chrome.