Sure, all network prefs can be set via policies.json.

• https://mozilla.github.io/policy-templates/#preferences
• https://support.mozilla.org/en-US/kb/customizing-firefox-using-policiesjson

You can open the about:policies page to see if policies are active and if errors are reported.

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

Good morning and thank you. I'm not understanding what entry from the template I should use for "network.http.rcwn.enabled". I don't see it even mentioned on the template.

Any further suggestions on how to proceed or what should be done?

If you check this example and substitute the preference you want to change for the third preference (since that is a boolean true/false preference), that may get you where you are trying to go:

https://mozilla.github.io/policy-templates/#policiesjson-83

By the third one, I mean this one:

{
  "policies": {
    "Preferences": {
      "browser.tabs.warnOnClose": {
        "Value": false,
        "Status": "locked"
      }
    }
  }
}

Good afternoon and thank you for responding. Let me clarify a bit. I don't see what exactly I should type for network.http.rcwn.enabled, would it just be network.http.rcwn.enabled? I understand everything else but couldn't determine exactly what syntax is for RCWN.

Thank you so much for replying I truly appreciate it.

I don't know what that preference does, but yes, if your policies.json file is only setting that preference, you would use

{
  "policies": {
    "Preferences": {
      "network.http.rcwn.enabled": {
        "Value": false,
        "Status": "locked"
      }
    }
  }
}

Okay thank you so much. I ended up trying it a few ways following my last post and got it working. Thank you so much for your time and assistance.