Firefox for Enterprise Community Forum

Hello,

New subscriber here. I have been given the task to test the install and uninstall of the Purview Firefox browser extension using Intune. I created 2 groups in EntraID, one for each (install and uninstall).

I have no issues with the installation. Initially, I left the test device in the install group and then added it to the uninstall group to remove it. (this usually works with other apps, it worked this way with the Purview Chrome browsing extension as well other apps) but when I do this, nothing happens.

Next, I removed the device from the install group and added it to the uninstall group only. Once the configuration profile applies to the test device, it allows the user to remove it manually (before it did not) but the extension remains installed.

I have created a policy using the administrative template extension uninstall option as well as with the OMA-URI settings but the same happens. When i check the device configuration for the device in Intune, it says it succeeded but that is not the case. The OMA-URI setting I was not too sure about, but gave it a shot. I used the UUID value for the Purview Firefox extension

I am attaching some pictures and hope someone can tell me what I am doing wrong. I can add additional information, if needed. I have opened a ticket with Microsoft last week but have not called me yet. I ran into this forum today.

Thanks in advance

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.

We recently update Firefox with version 138.0 and now getting the message "Gah. Your tab just crashed" when opening the browser.

We attempted to update and install version 138.0.1 only resulting with the same error. We also found and attempted the following all resulting with the same error: - change the about:config page for settings to false for both browser.tabs.remote.autostart and browser.tabs.remote.autostart.2

- clear browser cache.

- enable Temporary Mode in the Help menu. This appears to fix the problem but only for the current browser session. When a new Firefox window is opened, the error reappears.

What is needed to resolve this error or is there a way to permanently enable Temporary Mode or some similar setting? Thanks for all your help with this.

Hi. On an Active Directory, we deploy Firefox (normal or ESR). It's OK. When we deactivate the link of the GPO, it's supposed to uninstall. But it doesn't (even if we delete the GPO, specifying to uninstall at once).

The gpresult command on each computer doesn't show the GPO anymore, but Firefox is still installed.

( FYI, we used to do that with FrontMotion Community Edition, and it was always working (instal and uninstal). We even just tried the "last" (but old) ESR edition present on the FrontMotion site (CEESR-102), and it works. But FM CE version has stopped being developped. )

So, any idea about why the official Mozilla Firefox version (normal or ESR) doesn't uninstall?

Thanks by advance.

Hi,

I need to ask regardining this security.cert_pinning.enforcement_level. how can i set this value using the windwos server GPO? i could not find this even after copying the firefox.admx file. could someone please guide me how can i acheive it?

I would really appreciate the help!

Regards Sheras

We are currently considering using Firefox ESR as our default browser but experiencing a few issues and one of them is with our configured SailPoint IdentityIQ Single Sign-On Experience, which uses Basic Authentication.

Issue Description First, the login button needs to be clicked multiple times before access to the site is granted. Once signed in, the Firefox inbuilt authentication dialogue appears, prompting the user to log in again (see the attached screenshot). The landing page is only presented after clicking the login button several times. This creates a poor user experience, sometimes causing pages to load improperly. Interestingly, the same process works seamlessly in Edge Chromium.

Troubleshooting Steps Taken I have already attempted the following: 1. Temporarily disabled all custom and security settings in mozilla.cfg and config.json. 2. Temporarily disabled Firefox Tracking Protection. 3. Allowed third-party cookies for the specific URL. 4. Upgraded Firefox Version to 128.7.0 5. Since our Firefox browser is significantly hardened, I have also enabled and reconfigured the following settings in mozilla.cfg to ensure Basic Authentication is allowed, functions properly, and suppresses Firefox’s authentication prompt, but without success:

network.http.phishy-userpass-length = 255 network.http.use-basic-auth network.automatic-ntlm-auth.allow-non-fqdn network.automatic-ntlm-auth.trusted-uris security.enterprise_roots.enabled security.enterprise_roots.enabled

Observations from SailPoint Team Our colleagues from SailPoint have tested the setup in their environment, and according to them, it works as expected. However, their browser is not hardened, and they have leveraged the SailPoint UI for authentication instead of the built-in Firefox authentication prompt.

Further Investigation • Is there a specific configuration required in the user profile settings? • Network trace analysis shows 404 errors on GET requests and the following error codes on POST requests: • 302 Redirect: Mozilla Documentation • 408 Request Timeout: Mozilla Documentation

Next Steps Is there a specific security setting that needs to be enabled or disabled? Are there any particular Firefox enterprise policies we should modify? I have also attached screenshots for reference. Let me know if you need specific logs or network traces for further troubleshooting.

Hello community,

i would like to ask about how to deploy security.pki.certificate_transparency.disable_for_hosts globally for users? With version 135 a lot of production webapps stopped working and as of now , we have to do manual modification in about:config. Our company has over 300k users , so the possible disruption might arise very quickly and there will be significant loses in production enviroment.

Is there a way how to deploy this specific setting via GPO/SCCM ?

Thank you

I'm developing a parental control add-on, installed with policies.json. It works... but it's easy to disable it by simply deactivating it in private windows + opening a private window, which kinda makes it useless.

Is there a way to force my add-on to work in private windows, regardless of user choice?

If that's not possible, is it possible to somehow disable private windows while the add-on is disabled in private windows.

Note: I know that I can disable private browsing entirely with policies.json `privatebrowsingmodeavailability`, but I'd rather avoid it. Kids browing privately is a good idea :)

Form History Control (II) FoxyProxy Standard

These 2 extensions just installed themselves in Firefox ESR and disabled ALL my current extensions!!? I can't seem to remove them either.. please help!

I'm running Parrot OS (Linux) and had just signed myself in @hackthebox.com , which is a friendly place where people can learn to develop their cybersecurity skills. security on this site should be great, i don't know if this could be the issue...

Thanks in regards!

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!

We have an application running on Firefox and noticed that with new Firefox ESR, Ajax call (XMLHttpRequest ) from js script running on Firefox browser on thin clients seems to be blocked frequently (same call succeed most of the time, but blocked from time to time). Issue was raised starting with Firefox 128.2.0esr), but in general persist with newer Firefox ESR. We tried replacing XMLHttpRequest with fetch which seems making no much difference so far.

Hello,

I would like to create Managed Bookmarks for our company and distribute them via Group Policy. However, I am unable to create subfolders for these Managed Bookmarks, so they would all be in one folder and quite disorganized, which is why I need subfolders. Can I map this using a JSON file, and if so, could someone assist me with the structure of the JSON file?

Thank you in advance!

Kind regards

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). Everything works fine when a pref(...); entry is written to the firefox.cfg. However, we want the firefox.cfg to call the pref(...); entries from a global_config.js which is saved on the machines public directory.

Therefore, the firefox.cfg says:

// free line lockPref("autoadmin.global_config_url","file:///C:/Users/Public/.../global_config.js");

But firefox does not load whatever prefs are written to the global_config.js. There probably is problems with the formatting of the file path (file:///C:/Users/Public/.../global_config.js). What would the correct formatting look like? Unfortunately, Mozilla´s support guide only includes an example code for a firefox.cfg which calls a global_config.js via http:, but not via file:.

Using group policy there is various settings required for our users. We have been using the preferences policy located at: Administrative Templates > Mozilla > Firefox > Preferences

This policy requires the use of JSON, we have been using the following which has been working ok:

{ "media.navigator.permission.disabled": { "Value": true, "Status": "user" }, "browser.warnOnQuit": { "Value": true, "Status": "user" }, "keyword.enabled": { "Value": false, "Status": "user" }, "browser.tabs.unloadOnLowMemory": { "Value": false, "Status": "user" }, }

Within the old "Preferences (Deprecated)" there is a setting called "intl.accept_languages" which we are wanting to use but I can't seem to find a way to include this within the JSON. We are wanting to set it to "en-GB".

If I enable this within the old deprecated preferences section it causes the Preferences with the JSON to stop working.

I have tried various combinations of including it within the JSON but neither are working:

"intl.accept_languages": { "Value": en-GB, "Status": "user" }

"intl.accept.languages": { "Value": en-GB, "Status": "user" }

I've checked the Mozilla website here: https://mozilla.github.io/policy-templates/ There doesn't seem to be any reference for the intl.accept_languages setting to be used within the JSON

Please can someone advise?