Firefox for Enterprise Community Forum

Hey everyone. I am automating end-to-end testing with playwright for python, using the official Docker image from the microsoft artifact repository (using `playwright/python:v1.49.1`).

As I have signed certificates for my local domains with my own certificate authority, I am trying to have Firefox automatically install the certificates via a policies file. However, Firefox seems to ignore the policies file no matter what.

To ensure that the file itself is used, I simplified it to a single boolean value, and ensured that it's copied correctly inside the container via the `cat` command. Here are the current contents:

{

 "policies": {
   "DisableTelemetry": true

}

I know that the CA certificate is installed correctly, as it works out of the box using the WebKit browser and Curl command. I have gotten it to work in Chromium by installing it to nssdb using `certutil`.

I have converted the file from ASCII to the `utf-8` charset.

The file has the expected content, and I have copied it to both `/etc/firefox/policies/policies.json` and `/ms-playwright/firefox-1466/firefox/distribution/policies.json` (the path to the binary is `/ms-playwright/firefox-1466/firefox/firefox`).

Opening `about:policies` shows the text "The Enterprise Policies service is inactive.", which is sadly not very informative. It would be nice to have a list of locations it looks in, and any problems it encountered.

The container uses Firefox Nightly 132.

Are these locations incorrect? Is there any way to debug this? Does anyone have any other suggestions? If you need any more info (Dockerfile, etc.), please let me know.

Thanks in advance.

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I am having the same issue as this other user here: https://www.reddit.com/r/sysadmin/comments/17wvuwh/help_pinning_extension_in_firefox_with_gpo/

Preliminaries -- Initially (before trying to force-pin), I had these GPOs enabled:

Extensions to Install -> https://addons.mozilla.org/firefox/downloads/file/4410896/bitwarden_password_manager-2024.12.4.xpi

Prevent extensions from being disabled or removed ->

• {446900e4-71c2-419f-a6a7-df9c091e268b}
• {3f6129fb-6c55-4452-ab6f-7c109b2301df}
• https://addons.mozilla.org/firefox/downloads/file/4410896/bitwarden_password_manager-2024.12.4.xpi

(Those GPOs above all work.)

What I'm trying to do: Force-pin Bitwarden.

I believe I've followed the documentation correctly (except for not including a "*" case): https://mozilla.github.io/policy-templates/#extensionsettings

I've enabled this GPO with this value:

Extension Management ->

{

 "{446900e4-71c2-419f-a6a7-df9c091e268b}": {
   "default_area": "navbar"
 }

}

After running various "GPUpdate"s and whatnot, the option to uncheck "Pin to toolbar" is still available to click.

I've verified in "about:policies#active" that the JSON item appears next to "ExtensionSettings" and that there are no errors listed in the "Errors" tab.

I've also verified that it appears in the correct location in the Registry.

Since another user had the same issue (Reddit link above), I figured it'd be a good idea to check in with y'all to see if we are missing something.

Thanks for your help!

Firefox is used on Windows 11 Enterprise. There is a firefox.cfg in the installation directory (and an autoconfig.js in the ./defaults/pref sub-directory). The firefox.cfg targets an autoconfigfile.js. This setup is recommended here: [firefox using autoconfig"]

1. In the support article´s example, the firefox.cfg uses a pref(); expression. Is it possible to use a lockPref(); expression instead?
2. What is the result of either using pref(); expressions or user_pref(); expressions in the remoted autoconfigfile.js? Are both of them possible, especially while the firefox.cfg uses lockPref(); expressions instead of pref();?

I hope that somesone can help with one of these questions. Thanks a lot!