Yonke imikhiqizo Community Forum

How to disable Firefox add-ons in order to block to install temporary extensions. I am generating policies via Firefox Policy generator. {

 "name": "myconfig",
 "time": "2025-12-14T13:17:27.479Z",
 "configuration": {
   "arrayfields": {},
   "checkboxes": {
     "BlockAboutAddons": true,
     "BlockAboutConfig": true,
     "BlockAboutProfiles": true
   },
   "input": {},
   "textareas": {},
   "select": {}
 }

}

Is there a way to push a policy that will allow device and apps and local netwrok access via MDM (https://support.mozilla.org/en-US/kb/control-personal-device-local-network-permissions-firefox)? We need to allow Firefox to access an app agent that is running on a device via localhost. We would like to do it with a macOS profile, Windows GPO and a json policy for linux. I can't seem to find this setting in policy templates.

Cree una política para filtrado web donde bloquea por ejemplo páginas de juegos de azar, sin embargo, varias páginas las está dejando abrir, para contrarestar eso, por medio de indicadores bloquee las páginas que deja pasar pero aún así está dejando abrir ciertas páginas, por ejemplo betplay, para solventar eso apliqué una política de filtrado web, para esto importé el admx de Mozilla, sin embargo en Mozilla todavía está dejando entrar a esa página.

I would like access to Firefox Stories but the policy setting for FirefoxHome Stories is false. How do I get to these settings to change the false to true?

Until about a week ago the stories showed up on the New Tab. There is a side section on New Tab for customizing and the section had an option to see the stories. Now that section has no reference to the option.

Any suggestions?

Thanks,

Hello, For FF on Linux running in KIOSK mode, is there a way to allow the user to perform a refresh like you can do in normal mode by pressing F5 ? This seems to be disabled in KIOSK mode.

Thank you, Tom

How to get rid of "Your browser is being managed by your organization"? This thing is driving me crazy(er)! Please 'dumb down' your reply, as I am not computer literate. If it's a malicious attack, my anti-virus is not picking it up. Thanks!

When I go to some websites, such as Corair.com it hangs. I cannot click on anything. If I try to access specific pages via a search engine the same happens. I can close the browser but the 8+ processes don't terminate so I have to kill them from task manager.

I clear all of my browser history when I close FF so I can't remember all of the sites this happens on, but it was more than just Corsair.com.

I'm using 140.2.0esr, but also had the problem with 140.1.0esr. I did not have this issue on 128.12.0esr (I upgrade to 140 after that).

I tried turning use hardware acceleration off/on, that didn't fix it.

I am just about to try safe mode.

Dear Sir or Madam,

We are experiencing an issue with various users on our terminal servers whereby websites open very slowly when using Firefox. When I access the website using Edge from the same user session, everything works very quickly. We have already tried creating a new profile in Firefox and clearing the cache, but without success. Could you please help us?

The operating system used is Windows Server 2022.

I would like to know how the Firefox CVEs are affected on its version which are mentioned in NVD.

Let take mfsa2025-59, for example CVE-2025-8040, as per the NVD its says Firefox ESR < 140.1 is affected so does that mean it affect all the version which are lower than 140.1 which included the ESR 128 and ESR 115 versions or just the ESR 140 version series? then it raise on more question check this cve-2025-8029 in NVD it has specifically mentioned it only affect "Firefox ESR < 128.13, Firefox ESR < 140.1" and not the ESR 115 versions. Could anyone confirm it does not affect the ESR 115 versions or it affect all the versions? Now check this one cve-2025-8027, NVD clearly mentioned "Firefox ESR < 115.26, Firefox ESR < 128.13, Firefox ESR < 140.1" are affected so what I understand is that if the Firefox ESR 115 is vulnerable to any CVE it would be mentioned in the NVD specifically.

My point is that if any Firefox CVEs are listed in NVD and it specify only one version like “Firefox ESR < 140.1” what does that mean? Does it affect all the versions which include ESR 128 and ESR 115 or just the ESR 140 series version only affected? If any CVEs are affected on the ESR 115 and ESR 128 does Mozilla specifically mentioned those versions are affected right? Just like its mentioned in the cve-2025-8027

Any help would be appreciated to clarify this.

I am working on a stig for Mozilla Firefox and I'm trying to do a scap compliance scan but or some reason I am getting a score of zero on all systems. We do patch regularly and at some point one of the version upgrades caused our compliance scans stopped working. I need a fix and cannot find anything when searching for this issue.

I've been struggling for months to standardize a deployment of Firefox ESR across various client environments that reliably auto-updates and doesn't cause UAC prompts and XULRunner profile error pop-ups(I work in IT).

We deploy Firefox ESR in bulk on machines via a batch script which runs as SYSTEM, with msiexec /i and /qn flags.

Firefox installs fine, but then users are typically met with a UAC prompt when they first try to run Firefox. If they decline, then the UAC prompt comes back again next time and often fails to update at all, so the machine is left on an older, vulnerable version.

Regarding the environment: we have deployed the Firefox ESR admx templates and enabled the relevant auto update settings in Group Policy. But only some machines seem to stay up to date, and it seems like this only happens if a user with local administrative privileges has run the program at least once.

What I find unusual is that Firefox seems to attempt to make a "Background Updater" scheduled task for every user that runs the software on each PC, but these users do not have administrative privileges, and the scheduled task is set to only run when that user is logged in. Obviously a scheduled task running as a user with limited privileges isn't going to be able to update files in the Mozilla/Firefox subdirectory in "Program Files" as by default that's read-only access for non-admin users. And, obviously, if a user with local admin privileges DOES log into the machine, then it can update once, but then the scheduled task that it creates for that user (now with admin privileges) will only run when that user logs in - and we don't login as "admin"-privileged users day-to-day.

So, various machines are out of date, running vulnerable Firefox 128 instead of 140 or 142 even though they're all deployed from the same image and have the same policies and restrictions, and ran the same installer for Firefox.

Is there some reason why the auto update scheduled task isn't created at installation time, when administrative privileges have been granted? It's very odd that it doesn't, because then every time a user logs into a machine it seems like Firefox ESR creates the background upgrade task under a non-admin user which simply won't work. I see machines having 4 or 5 background upgrade scheduled tasks, all created by Firefox ESR, and yet the software still won't update - there's a UAC prompt every time the program launches, and going to Help -> About shows "Restart Firefox to update..." but then when clicking the button to restart Firefox, we get the UAC prompt, user doesn't have privileges, so this goes around and around in circles.

Is there a reliable way to keep Firefox up to date without manually logging into each machine and going through the UAC prompts? Can we manually create a scheduled task with the correct user account that has privileges to actually upgrade Firefox?

The background auto update mechanism simply doesn't make sense to our team on a machine-wide install.

Hello

We want to set up a GPO that when users exit their Firefox browser, all of there cookies and cache gets deleted.

How do we do this?

Thanks

Hi,

I have 2 machines (Win10 and Win11) with FF 140.3.1esr (32-bit) installed which demonstrates the same failure when I enter one site's url:

PR_CONNECT_RESET_ERROR

Chrome at the same machines goes at this url w/o any failures. Any ideas what to change on "about:config" in FF to allow it opening this url w/o such error?

Hello Everyone,

I am seeking assistance to configure Firefox browser so that internet access is blocked when the browser cannot download or access the proxy Auto-configuration (PAC) file. Our organisation enforces all web traffic through proxy servers defined by a PAC file. For compliance and security reasons, users should not have any direct internet access unless the browser is able to successfully retrieve and apply the PAC file.

The desired behaviour is:

1. Firefox attempts to download the PAC file from a defined URL. 2. If the PAC file is unreachable or fails to load (e.g., due to network restrictions or the device being outside the corporate network), Firefox should "fail closed" - meaning it should not allow any direct internet traffic. 3. This is effectively a "fail-block" mode: no fallback to direct connections, and no cached or bypassed proxy settings should allow internet browsing.

This behaviour is critical to prevent devices from accessing the internet without applying corporate proxy rules. I would like to know:

1/ Whether Firefox currently supports a setting or policy that enforces this fail-block condition when the PAC file is unavailable. 2/ If not, whether there are recommended configurations or enterprise policies (e.g., via `policies.json` or Group Policy templates) that could achieve equivalent enforcement.

Thank you for your assistance and guidance.

We are currently rolling out a profile management solution based on Ivanti User Environment Manager. In order to configure file includes and excludes in the profile management tool, we have to “standardize” the Firefox profile path in the filesystem. We have implemented a PowerShell script, which reads the currently used profile from %appdata%\Mozilla\Firefox\install.ini, renames the appropriate profile subfolder to “firefox.default-esr” and replaces the entries in installs.ini and profiles.ini.

The script seems to be reliable. However, for around 10% of the users, we are seeing issues when the user launches Firefox after the “firefox profile migration” happened. Firefox opens but none of the GUI controls is accessible. Firefox is completely unusable. See screenshot attached.

We do have workarounds to resolve this issue, such as completely wiping the %appdata%\Mozilla\Firefox folder and let Firefox re-build everything from scratch. But we are still trying to find the root cause the issue, because our customers have more than 100k clients, what will be a big impact and hard to handle for the helpdesk.

We are currently unable to reproduce the issue on test clients. Even copied Firefox profile folders form affected clients don’t show the issue on other clients.

Therefore we want to find out and ask for your help:

- Is there a supported way to “standardize” the filesystem folder name of the Mozilla Firefox (ESR) profile of a user? - What are the files within a Firefox profile that are required for the profile and the application itself to properly start? - Do you have any idea which files in a Firefox profile (in a corrupted state) could cause our issue?

I am logged on to my Credit Union and attempt to download my statements. When using Firefox I get the message: {"Errors":["Authorization has been denied for this request."]}

When I contacted my CU, they said to add an URL to the Manage Exceptions. This worked, but I want to know why Firefox needs this but Chrome doesn't.

Hello,

I had issue to verify the cert on android app for https://partners-enrichment.heytelecom.be. On Windows I didn't have the same issue.

version 144.0.2 / build id 20251027123126 / target arm64-v8a armeabi-v7a x86_64 Device: Samsung S22 / One UI 7.0 / Android version 15 / version S901U1UES8FYI2 / Security patch level September 1, 2025

Error: Secure Connection Failed, because its certificate issuer is unknown, the certificate is self-signed, or the server is not sending the correct intermediate certificates.

CertChain RCA: DigiCert Global Root G2 DCA: DigiCert Global G2 TLS RSA SHA256 2020 CA1 cert: partners-enrichment.heytelecom.be

1) I couldn't check the cert from the gui as on windows. Shield in search bar / Connection not secure doesn't opened the cert. Is it expected?

2) I found this helppage: https://support.mozilla.org/en-US/kb/setting-certificate-authorities-firefox

Unfortunately about:preferences isn't available on android (ref. https://www.reddit.com/r/firefox/comments/u593x0/how_to_access_to_aboutpreferences_on_android/)

I see in about:certificate which is the correct RCA (I verified the pem file with the root). DigiCert Global Root G2

Where do I check the Intermediate CA's (DCA)?

3) When exporting the RCA it has been download as: digicert-global-root-g2.pem.txt Why the txt at the end?

On Windows it downloads as digicert-global-root-g2.pem

Kind regards,