Firefox for Enterprise Community Forum

This is a personal computer, not associated with any organization. I do not believe it to be necessary on this browser. If it is, please advise. If it is not necessary, please tell me how to disable,deactivate, or remove it. This message only appears in firefox. I don't know where it came from and therefore I do not trust it being there. If it was placed there BY fire fox, also please advise.

I am using Firefox as a multi-tab courseware viewer but need to block the user bringing up the Library page as then the user can see the courseware URL's - I am running it on AWS AppStream and can lock most features down., but this one eludes me - there seems to be no policy to block it. I have tried intercepting keystrokes at the GNOME level and autoconfig javascript to block keys. Is there a way to do this please? Blessings, Ian

I know nothing about the dev options for Internet settings and minor turned on and it says the remote server is set to production. No flipping idea what this is. Can somebody please help me?

When logging into microsoft web apps using Firefox 140.9.0esr (aarch64) on my MacBook Pro, I get an error message reading "Bad Request - Header Field Too Long. HTTP Error 400. A request header field is too long." This error page loads after I sign-in using my workplace credentials on the sign-in page. For example, going to outlook.office365.com/mail.

I've done some searching online already for solutions and have tried: 1) turning off enhanced tracking protection for this site 2) turning off all browser add-ons and extensions 3) regenerating the cookies4.sqlite* files in the Firefox Profiles folder 4) starting in "Troubleshoot Mode"

The only thing that's worked has been to start Firefox in the mode where windows are not private, and then select "New Private Window" from the File menu. Within that window I can log in successfully to Microsoft Web Apps. BUT, when I turn on "Always Use Private Browsing Mode" in the settings and restart firefox, I get the "Header Field Too Long" error message even though the browser window is private. I'd like to run in Always Use Private Browsing mode.

Ideas and help? TIA Dave

My system: Firefox 140.9.0 esr (aarch64) MacBook Pro, Mac14.6, Apple M2 Max with 12 cores, 32 GB memory macOS 26.3.1

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

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.

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.

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.

I want nothing to do with AI.

I have unticked perplexity.ai in preferences#search but every search from the search bar and address bar goes to perplexity.ai then immediately crashes and displays "Internal Error".

To use DDG I have to type duckduckgo.com on the address bar then search from there.

Firefox 140.4.0 ESR.

I've' scanned the PC with malwarebytes. I restored windows from a backup image I haven't made any changes to the PC at all. Was working fine in the AM but by later afternoon, it started using perplexity.ai exclusively.

How do I get rid of perplexity.ai

I have recently needed to update my motherboard, and the workshop put my C: and D: drives into an old second-hand motherboard they had. I have now checked Firefox - which was on my C: drive, and it works with all my old bookmarks. However I seem to now be part of an 'Enterprise', which I do not want. How do I get rid of my involvement with an Enterprise within Firefox? Thanks for your help. Kanga85

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!

The recommended methods, changing to this in the registry :

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Mozilla\Firefox\Certificates] "ImportEnterpriseRoots"=dword:00000000

Reverts back to 00000001

Put this policies.json and did nothing: {

 "policies": {
   "Certificates": {
     "ImportEnterpriseRoots": false
   }
 }

} What am I missing or what's changed?

My specific need at the moment is to add another search engine option in about:preferences#search

Thanks.

Until recently the Firefox docs described how to use the CDP-based Remote Agent at [this url](https://firefox-source-docs.mozilla.org/remote/cdp/Usage.html), now defunct. Here is the latest archive version I can find from the end of last year: https://web.archive.org/web/20241126214503/https://firefox-source-docs.mozilla.org/remote/cdp/Usage.html

One usage example looked like this:

% firefox --remote-debugging-port DevTools listening on ws://localhost:9222/devtools/browser/7b4e84a4-597f-4839-ac6d-c9e86d16fb83

I have tried the same but get no websocket address returned:- ``` % firefox-esr Mozilla Firefox 128.11.0esr ``` ``` % firefox-esr -h ... ... --remote-debugging-port [<port>] Start the Firefox Remote Agent,

                    which is a low-level remote debugging interface used for WebDriver
                    BiDi and CDP. Defaults to port 9222.

... ... ```

`% firefox-esr --remote-debugging-port` command exits with nothing returned

I have `remote.active-protocols` set to 3 in my Firefox prefs.

Please advise how I get the Remote Agent to return a websocket address for use with BiDi with FF 128. My OS is Debian-based Linux.

TIA

I'm using Firefox ESR 128.10.1esr on Kali, and I'm encountering an issue where the 'Refresh Firefox' option is missing from the ☰ → Help → Troubleshooting more Information. This is preventing me from restoring Firefox to its default settings. I've already tried the following:

   Restarting Firefox

   Clearing the startup cache

   Confirmed there are no extensions installed

None of these steps have fixed the issue. I need a way to reset Firefox ESR to factory defaults, but I can't find an option to do so. Attached is a screenshot of the Troubleshooting Information page.

Any assistance would be greatly appreciated!

Trying to block www.share365.net but it's not working

{

 "policies": {
     "WebsiteFilter": {
         "Block": [
           "*:share365.net",
           "*:www.share365.net",
           "*://share365.net/*"
         ]
     }
 }

}

I am going to deploy Firefox ESR in an environment where the default topsites provided by the top-sites.json included in omni.ja (namely Wikipedia, youtube and reddit) are not desirable, and I want to provide my own. I cannot find a way to do so.

Setting the browser.newtabpage.activity-stream.default.sites preference through the policies.json file does not work (the pref gets loaded but it does not influence the actual default topsites, which is not surprising since the default value of this pref has nothing to do with the actual default topsites).

Note that I am not seeking to remove the topsites from the homepage entirely (as would be achieved through the FirefoxHome/TopSites policy), I want to change the default ones.

I tried creating my own top-sites.json in /lib/firefox-esr/browser/ where omni.ja resides, but to no avail.

I am trying to manage Firefox browser for our users with MDM. On doing so, I can't able to get expected output on blocking the camera access for certain websites with the following OMA-URI.

./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox~Permissions~Camera/Camera_Block

I can add websites in allow section and even lock the setting so that the users can't change. But facing issues with blocking camera access.

Is there any place where I can see the log if there are any error encountering by any chance? Any insights or suggestions would be greatly appreciated.

Thanks in advance!

We have Firefox deployed and managed through Intune/Endpoint and all works well but every device has an error with this line of the policy:

UserMessaging_FirefoxLabs [./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox~UserMessaging/UserMessaging_FirefoxLabs] STATE Error SOURCE PROFILES Source Profile Mozilla_Firefox_Configuration ERROR CODE 0x87d1fde8

The error code is the same on all devices and is the only one present in on each device config.

Does anyone have any idea what the issue and resolution would be?

Thanks, Matt