Firefox for Enterprise Support Forum

Hi there,

we trying to restrict internet access that used Mozilla Firefox on client computers through Microsoft Intune.

We have already configured policy by uploading ADMX template & Custom OMA-URI as described in https://github.com/mozilla/policy-templates/blob/master/README.md 

We are trying to add custom allowed web sites to "WebsiteFilter" OMA-URI ./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox/B_WebsiteFilter_Exceptions. added web sites are not allowed. my question is what is the best way to enter URLs (I mean format) to allow list & how I can used wild card to allow all the web sites of one specific domain. eg:- microsoft

Hi there,

We are currently utilizing Windows Server 2019 as our development server. To maintain security protocols, we have implemented a Group Policy to block internet access on this server. Initially, this configuration successfully restricted internet access on all browsers, including Firefox. However, recently we encountered an issue where internet access became available solely through the Firefox browser, posing a significant data security risk.

Upon investigation, we discovered that Firefox allows users to modify proxy settings, effectively bypassing our Group Policy restrictions. Unlike other browsers, Firefox permits users to adjust proxy settings without sufficient rights, thus overriding our established restrictions.

To mitigate this issue, we require guidance on enforcing Group Policy settings within Firefox to prevent unauthorized alterations to proxy settings and ensure internet access remains restricted. It's important to note that Firefox is exclusively utilized for development purposes on our server.

Your assistance in resolving this matter would be greatly appreciated.

Regards, Hiten

Attempting to disable FF Password manager completely for my org via a plist.

Currently have the password manager itself disabled but can't figure out how to disable the Auto-fill settings with previously saved passwords prior to the password manager being disabled?

Is this possible? Or is this disabled already when the password manager itself is disabled?

Currently have this set via a plist:

<key>PasswordManagerEnabled</key> <false/>

My company needs to follow regulation on Export rules. I need to provide our ITAR regulation team "Vendor documentation" regarding the Export Control Classification Number (ECCN) for Mozilla Firefox ESR. They will not accept a blog or article. Any one from Mozilla able to provide this in an official capacity?

We are currently attempting to automate our Firefox update processes. Currently we use robocopy to push out new versions on release, but ideally we'd like to use the background updater instead. We are currently on 64-bit 119.0.1, on Windows 10 Pro 22H2. We'd prefer not to switch over to ESR if at all possible. I've already reactivated the AppAutoUpdate and BackgroundAppUpdate policies, and DisableAppUpdate is disabled, but I'm still being hit with a UAC Admin prompt when I try to launch Firefox. I tried to bypass it through the registry at [HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers], with "C:\Program Files\Mozilla Firefox\firefox.exe" = "RUNASINVOKER", but that also doesn't seem to have done anything. Any and all assistance would be appreciated

When setting Windows to "Require DoH", firefox will not resolve DNS addresses, regardless of which "Enable secure DNS" setting is picked in FireFox security settings tab.

I expected at least "Off -- Use your default DNS resolver" to work.

If Windows is configured to just "Allow DoH", Firefox has no issues resolving DNS addresses, for any of the Firefox policy settings.

For reference, you can find the DoH policy setting in windows group policy editor, here:

gpedit.msc

Computer Configuration -> Administrative Templates -> Network -> DNS Client -> Configure DNS over HTTPS

(Have to enable it, then select Configure DoH options: Require DoH.)

you may need to issue a gpupdate /force for the setting to be picked up quickly.

We followed the links below to block internet access in Firefox browser:

https://www.youtube.com/watch?v=fAGYYX5hYb8 https://github.com/mozilla/policy-templates/releases

We downloaded the ADMX and ADML files. Using these files, we were able to locate Mozilla Firefox in Group Policy Management and successfully block all websites in the Firefox browser using the pattern :///*.

However, we encountered an issue with exceptions. We do not wish to block certain websites, including localhost. We attempted to use the "Exceptions to block websites" option, providing values such as ://msn.com/ to exclude specific sites. Unfortunately, this approach did not work as intended. For instance, msn.com is one of the websites we want to allow, among others and also localhost.

We require assistance with the following issue: "Exceptions to block websites" is not functioning properly within the group policy of Mozilla Firefox.

Can we set up these gpo`s so that there is a check for dependencies?

Windows (GPO)

Software\Policies\Mozilla\Firefox\SecurityDevices\Add\NAME_OF_DEVICE_TO_ADD = PATH_TO_LIBRARY_FOR_DEVICE Software\Policies\Mozilla\Firefox\SecurityDevices\Remove\1 = NAME_OF_DEVICE_TO_REMOVE

Thank you.

Hi Team, I'm using the Zscaler in my network, when I use the Firefox, appear the error:

"Software is Preventing Firefox From Safely Connecting to This Site

www.googleadservices.com is most likely a safe site, but a secure connection could not be established. This issue is caused by Zscaler Root CA, which is either software on your computer or your network.

What can you do about it?

www.googleadservices.com has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely...." Picture 1

I have root certificate in path: /usr/share/ca-certificates/mozilla$ Picture 2

I run the command for updates CA but it doesn't work: sudo update-ca-certificates

Errors keep popping up.

The certificate not appear in the Certificate manager > Authorities Picture 3

But if I open the firefox > Settings > Privacy & Security> Certifcates > View Certificates > Import And I import the certificate ZscalerRoot.crt and I mark the option "trust this CA to identify websites" the firefox works, and I can open the site without error message.

Picture 4

And the certificate appear in the manager certificate: Picture 5

How can I put the command terminal certificate, which I have on hundreds of machines?

Note: I need to put the certificate only for internet access.

Hi,

I've been tasked to make some changes to the way users deal with logins and passwords in the office. So, in short, one of the issues is this: is there ANY way to disable (I'd say "hide" is more accurate) the about:logins page on Firefox?

• pref.privacy.disable_button.view_passwords (with a lock pref) in autoconfig only disables the "View saved logins" button in Settings.

As for policies:

• a few policies for blocking about: pages do exist - BlockAboutAddons/Config/Profiles/Support, but can't find one, say, "BlockAboutLogins" or something like that.
• PasswordManagerEnabled set to false disables the password manager completely, including about:logins, password autofill is disabled as well - not what I need.
• WebsiteFilter, as expected, doesn't treat about: as a protocol, so it can't be done there either.

Any help is appreciated. Thanks in advance!

We have a customer using our SaaS solution running through Firefox 91.12.0 ESR. The web application we provide requires access to the camera on the local machine so we can capture a photo. We give them instructions and they configure their instance of Firefox to ALLOW access to the camera, along with several other adjustments (like allowing pop-ups, and no autofill).

However, whenever they restart Firefox the camera permission reverts back to the DEFAULT of Always Ask. The other settings adjustments we make, like pop-ups and no autofill stick around, but not the camera setting.

We've checked the PREF.js file in the Profile folder and that doesn't appear to be a problem. On our in-house machines we are running the same version of Windows and Firefox and cannot reproduce the problem.

The customer has recently applied the upgrade from an earlier version of Firefox ESR to 91.12.0. The customer has also imaged the PC and copied over to a large number of additional machines for use around their organization. This problem is causing a serious disruption to their deployment of the updated PC's as we work with them to try and troubleshoot the problem.

Any ideas on what to try would be appreciated.

Hello,

I have a problem with a pac file in our org. We download it from a server. The basic functionality is applied and it does redirect the desired traffic to the proxy. The problem occurs when the proxy goes down, it then should automaticaly start making direct connections, but the connections fail. We want to proxy only http and https and event that with some exceptions.

It was done according to https://developer.mozilla.org/en-US/docs/Web/HTTP/Proxy_servers_and_tunneling/Proxy_Auto-Configuration_PAC_file#example_6

Is there any problem with PAC file or does the browser have issues with the config?

Thanks for any help.

function FindProxyForURL(url, host) {

   /* Our proxy list */
   OURPROXY = "PROXY 172.22.59.X:3128; DIRECT"
   INOUR = "ourgroup.internal"

   /* Normalize the URL and HOST for pattern matching */
   url = url.toLowerCase();
   host = host.toLowerCase();

   /* Our Network Entry */
   if (isResolvable(INOUR)) {
       /* Don't proxy local services */
       if (isInNet(host, "10.0.0.0", "255.0.0.0")
       ) {
           return "DIRECT";
       }

       /* Proxy only http & https */
       if (url.substring(0, 5) == "http:" || url.substring(0, 6) == "https:") {
           /* Don't proxy local hostnames (without dots) */
           if (isPlainHostName(host)) {
               return "DIRECT";
           }
           /* END: Don't proxy local hostnames */
           /* START: Internal systems */
           if (shExpMatch(host, "*.example.com") ||
               shExpMatch(host, "example.com") ||
               /* END: Internal systems */
               /* START: Split VPN tunnel */
               shExpMatch(host, "*.example2.com") ||
               shExpMatch(host, "example2.com") ||
               /* END: Split VPN tunnel */
           ) {
               return "DIRECT";
           }
           /* END: Don't proxy to internal systems */
           return OURPROXY;
       } else {
         return "DIRECT";
       }
       /* END: Proxy only http & https */
   } else {
     return "DIRECT";
   }
   /* END: Our Network Entry */
   return "DIRECT";

}

on GitHub the commands are all based on Java https://github.com/mozilla/policy-templates#preferences

Is there a list of all available registry settings? Or where do these Java options come from, where can I read them out?

I am an administrator at a university and we use Blackboard and Zoom as a couple of the tools at our university. We install Firefox on all of our PCs across campus. After a recent update, when our instructors try to launch Zoom using the integration setup in Blackboard, the meeting fails to launch. We have found that disabling Enhanced Protection fixes this issue. Is there a way to add this exception to an install file that can be sent across many PCs on our campus? We have hundreds of PCs and going from one to another to install this exception would not be practical.

Do you have any suggestions? Justin

Hi,

I'm blocked because for my company i have to make a GPO that will setup the default handler for pdf files. I picked up different codes on internet but it went the same way for all of them, it didn't work. Im pretty sure that's not a GPO application issue because actually all the others setings are working perfectly.

The json code was paste on the Handlers settings as u can see in the attachement.

Hopefully that i will find help there.

Cordially.

Some users in my organization have been complaining about FireFox location protection since the update to 103.0.2. We would like an option to completely disable this "feature". Our users are complaining about having to individually make exceptions via the shield icon and selecting custom and unchecking all boxes does not work for our use case scenario. Is there any option to disable this completely or are there plans in future releases to allow us a disable feature (like you used to have) or is the only solution to switch our users to Chrome? Thanks

Hi, Background: a few months ago I had to redeploy the CA for a network I manage. I was able to do so and publish the new intermediate CA's cert via Active Directory. Since then, I've updated certs on webhosts with certs from the new CA. Whenever a user uses FF (version 91.12.0) to browse to a site with the newly signed cert, I get an error stating "sec_error_ocsp_old". I've been able to temporarily advise users to disable OCSP Validation in FF security settings, but I'd REALLY like to fix this.

Other browsers (Edge, Chrome, Opera) all load the sites without issue.

Using this the below article, I double checked the time settings on the CA, Webserver, and clients: https://support.mozilla.org/en-US/kb/troubleshoot-time-errors-secure-websites

All the machines/VMs in question show the same time source, time, time zone, and sync interval.

I'm at a loss for what is happening. Any help would be greatly appreciated.