This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

How to Add preferences to Firefox through Windows Server Group Policy

more options

Hi everyone. I have installed Firefox on all windows 10 workstations and I have also installed latest Firefox Group Policy ADMX on Server. I need to set some preferences on all Workstations. The preferences that I want to set are the ones that can be found in about:config.

But the problem is that only some of these preferences exist in Group Policy by default and it says "deprecated". I know that I can add additional about:config preferences in a Group Policy object called "Preferences". But no matter how I enter the format or how I change the JASON file, no preference policy is applied to Firefox in workstations. By the way when I change "Preferences" gpo in group Policy the next Policy called "Preferences (JASON on one file)" does also change. I have thoroughly searched the web and Mozilla support and have tested all suggestions but all to no avail. Can you please help me and Give me an example of how to do that? I would appreciate any answer in advance.

Hi everyone. I have installed Firefox on all windows 10 workstations and I have also installed latest Firefox Group Policy ADMX on Server. I need to set some preferences on all Workstations. The preferences that I want to set are the ones that can be found in about:config. But the problem is that only some of these preferences exist in Group Policy by default and it says "deprecated". I know that I can add additional about:config preferences in a Group Policy object called "Preferences". But no matter how I enter the format or how I change the JASON file, no preference policy is applied to Firefox in workstations. By the way when I change "Preferences" gpo in group Policy the next Policy called "Preferences (JASON on one file)" does also change. I have thoroughly searched the web and Mozilla support and have tested all suggestions but all to no avail. Can you please help me and Give me an example of how to do that? I would appreciate any answer in advance.

Isisombulu esikhethiweyo

Please read https://mozilla.github.io/policy-templates/#preferences

NOTE On Windows, in order to use this policy, you must clear all settings in the old Preferences (Deprecated) section in group policy.

Funda le mpendulo kwimeko leyo 👍 1

All Replies (4)

more options

Isisombululo esiKhethiweyo

Please read https://mozilla.github.io/policy-templates/#preferences

NOTE On Windows, in order to use this policy, you must clear all settings in the old Preferences (Deprecated) section in group policy.

more options

thank you for the reply. this solved my problem. I really appreciate it. but I still have another question. I want to lock (force enable) "Block dangerous and deceptive content" in firefox settings and I have not found this setting in group policy objects. So I have to change it via "Preferences" in Group Policy via about:config records. I have been able to find the sub-items "Block dangerous downloads" and "Warn you about unwanted and uncommon software" in about:config and subsequently I have locked then through "Preferences" in gpo. But I haven't been able to find the parent record "Block dangerous and deceptive content" in about:config. How can I find it?

Ilungisiwe ngu manoochehr.zangooei

more options

This is browser.safebrowsing.malware.enabled and browser.safebrowsing.phishing.enabled.

more options

thank you for the response. It really solved my problem. I really appreciate your help and contribution.