Windows 7
Can you extend support for today only?
Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.
Learn More
Can you extend support for today only?
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 manag… (read more)
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?
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-configu… (read more)
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.
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 C… (read more)
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?
How is possible to disable telemetry/reporting for Firefox Translation when deploying Firefox? Is there a specific about:config settings?
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 … (read more)
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
I have a few questions regarding the auto-update policy of extensions installed via ExtensionSettings with the force_installed installation mode. Can the extension re… (read more)
I have a few questions regarding the auto-update policy of extensions installed via ExtensionSettings with the force_installed installation mode.
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 say… (read more)
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.
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 websit… (read more)
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.
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 t… (read more)
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.
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. … (read more)
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!
I have a lot of Firefox windows and tabs open, and I really don't want to lose my session. I wanted to open a webpage in Firefox in fullscreen mode. But evidently there'… (read more)
I have a lot of Firefox windows and tabs open, and I really don't want to lose my session.
I wanted to open a webpage in Firefox in fullscreen mode. But evidently there's some kind of serious flaw in Firefox that makes it incapable of opening webpages in fullscreen mode. Everyone says the only workaround is to open the webpage in kiosk mode. So I tried it.
But now I have two big problems:
1. One of my Firefox windows, with all its tabs, is stuck in kiosk mode. (Even if I close the window and then restore it with Ctrl+Shift+T, it's still in kiosk mode.)
2. All new Firefox windows I open with Ctrl+N are also stuck in kiosk mode.
I don't know what to do, and I'd really appreciate any help. Thanks!
How do I make sure FireFox has current update? If not current how to update FireFox?
Hello. When navigating YouTube on the main page, if you simply Hover the mouse over "Previous page (Alt+Left)", then SOMETIMES strange music or some strange video plays. … (read more)
Hello. When navigating YouTube on the main page, if you simply Hover the mouse over "Previous page (Alt+Left)", then SOMETIMES strange music or some strange video plays. Important: there is no video of this unknown video, just the sound plays. Other browser tabs are closed, only the YouTube tab is open. I use Firefox ESR, since I have Windows 7, I use the latest version of Firefox ESR. The extensions that are installed are Ublock origin and uvpn. I don't know if it could have been infected by an unknown virus? I scanned with ESET, installed Comodo, but the problem was not solved. I would really like you to sort this out. Please don't ignore me. I want to understand what's going on. I am open to new questions on this topic that will help resolve this situation.
Hi guys, I'm trying to uninstall an extension using a GPO, but it's not working. I've placed a GPO on the user's OU and configured the ID to be removed in the User-Part… (read more)
Hi guys,
I'm trying to uninstall an extension using a GPO, but it's not working.
I've placed a GPO on the user's OU and configured the ID to be removed in the User-Part of that GPO. I previously retrieved the ID using about:debugging.
But nothing happens; the extension isn't removed. (Logoff/Logon/reboot/gpupdate /force .....)
128.11.0esr (64-Bit)
The GPOs for Edge and Chrome have the same function. Enter the ID there, and the extension is reliably removed.
Any suggestions? Thanks
Michael
remove your organization has control of your browser
The recommended methods, changing to this in the registry : [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Mozilla\Firefox\Certificates] "ImportEnterpriseRoots"=dword:000000… (read more)
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.
I am a DNS administator at my employers and notice that on my employers network that aus3.mozilla.org and aus4.mozilla.org seem to be returning NXDOMAIN both with our on … (read more)
I am a DNS administator at my employers and notice that on my employers network that aus3.mozilla.org and aus4.mozilla.org seem to be returning NXDOMAIN both with our on prem DNS and via the public dns providers when a browser attempts update it can fail.
Have other Australian users reported such behavior and are these hosts still valid
DIG
grudd@crayon:~$ dig @8.8.8.8 aus3.mozilla.org
mozilla.org. 2 IN SOA infoblox1.private.mdc1.mozilla.com. hostmaster.mozilla.com. 2024020614 180 180 1209600 60
grudd@crayon:~$ dig stun.services.mozilla.com
services.mozilla.com. 836 IN SOA ns-679.awsdns-20.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
grudd@crayon:~$ dig @8.8.8.8 stun.services.mozilla.com
services.mozilla.com. 127 IN SOA ns-679.awsdns-20.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
grudd@crayon:~$ dig @8.8.8.8 aus4.mozilla.org
mozilla.org. 40 IN SOA infoblox1.private.mdc1.mozilla.com. hostmaster.mozilla.com. 2024020614 180 180 1209600 60
grudd@crayon:~$ dig @8.8.8.8 aus4.mozilla.org
mozilla.org. 35 IN SOA infoblox1.private.mdc1.mozilla.com. hostmaster.mozilla.com. 2024020614 180 180 1209600 60
grudd@crayon:~$ dig @8.8.8.8 aus5.mozilla.org
aus5.mozilla.org. 48 IN CNAME balrog-aus5.r53-2.services.mozilla.com. balrog-aus5.r53-2.services.mozilla.com. 58 IN CNAME prod.balrog.prod.cloudops.mozgcp.net. prod.balrog.prod.cloudops.mozgcp.net. 984 IN A 35.244.181.201
grudd@crayon:~$ dig @8.8.8.8 aus5.mozilla.org SOA
aus5.mozilla.org. 42 IN CNAME balrog-aus5.r53-2.services.mozilla.com. balrog-aus5.r53-2.services.mozilla.com. 52 IN CNAME prod.balrog.prod.cloudops.mozgcp.net.
balrog.prod.cloudops.mozgcp.net. 300 IN SOA ns-cloud-d1.googledomains.com. cloud-dns-hostmaster.google.com. 1 21600 3600 259200 300
grudd@crayon:~$
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 Informatio… (read more)
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!
I am using macOS versions 12.7.6 and 10.13.6 on 2 separate drives. Will 10.13.6 be supported with ESR 140