Firefox for Enterprise Support Forum

Environment: Windows 10 22h2 clients, latest ESR build, Domain servers Windows 2016 or better.

So I followed the guide https://github.com/mozilla/policy-templates/blob/master/README.md#extensionsettings and tried to set up the config. We are using the latest ESR build but after the settings is applied I still dont have working extensions.

Here is the code

{
     "*": {
           "blocked_install_message": "Addon or Extension is not approved. Please submit a ticket to Help Desk if you need access to this extension.",
           "install_sources": ["https://addons.mozilla.org/"],
           "installation_mode": "blocked"
     },
     "{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}": {
           "installation_mode": "allowed",
           "install_url": "https://addons.mozilla.org/firefox/downloads/latest/adblock-plus/latest.xpi"
           },
     "ciscowebexstart1@cisco.com": {
           "installation_mode": "allowed",
           "install_url": "https://addons.mozilla.org/firefox/downloads/latest/cisco-webex-extension/latest.xpi"
     },
     "{d0210f13-a970-4f1e-8322-0f76ec80adde}": {
           "installation_mode": "allowed",
           "install_url": "https://addons.mozilla.org/firefox/downloads/latest/instapaper-official/latest.xpi"
           },
     "appstore-mini@feedly.com": {
           "installation_mode": "allowed",
           "install_url": "https://addons.mozilla.org/firefox/downloads/latest/feedly_mini/latest.xpi"
           },
     "extension@one-tab.com": {
           "installation_mode": "allowed",
           "install_url": "https://addons.mozilla.org/firefox/downloads/latest/onetab/latest.xpi"
           },
     "support@lastpass.com": {
           "installation_mode": "allowed",
           "install_url": "https://addons.mozilla.org/firefox/downloads/latest/lastpass-password-manager/latest.xpi"
           },
     "sweb2pdfextension.4@kofax.com": {
           "installation_mode": "allowed",
           "install_url": "https://addons.mozilla.org/firefox/downloads/latest/kofax-pdf-create-4-0/latest.xpi"
           },
     "Aternity-WebExt-12.1.4@aternity.com": {
           "installation_mode": "allowed",
           },
     "its_addons_wrap@onelog.com": {
           "installation_mode": "allowed",
           "install_url": "https://extensions.onelog.com/extension/onelog.xpi"
     }

}

I have placed the settings in HKCU but also tried in HKLM and there has been no difference. in each case I get Unable to parse JSON for Extensionsettings when checking the about:policies section and when I look at the registry I see the REG_MULTI_SZ value but when i click on it to read it I get another error message. Cannot edit ExtensionSettings: Error reading the values contents.

I tried re-entering the code and tried not listing the install URLs and even tried only listing 1 item. I haven't been able to get past this error so any help would be greatly appreciated.

Hello,

I am managing Firefox for a very large organization. We have several extension that we deploy using registry keys and we don't allow users to install additional addons. However, since version 102.3 I noticed some extensions that are present on the machine as .xpi files, but should not install unless a specific application is also present, are also being activated. They are enabled in the add-on manager, the information is present in the "extensions.json" and "extension-preferences.json" files. This should not happen. Is there any way to prevent the activation of these files?

Thank you!

Hello,

Firefox 102.6.0esr (x64) Firefox 108.2.0 (x64)

after implementing the bookmarks (JSON) setting by GPO policy, it turns out that an entry for Bookmarks is created in the registry and not ManagedBookmarks, which causes bookmarks not to appear in the bookmarks bar. When I manually rename a registry entry from Bookmarks to ManagedBookmarks, the bookmarks appear properly. Please let me know if I'm doing something wrong or if there really is a problem reported by me.

Yours sincerely Bart

Hello, ever since we moved endpoints from Firefox ESR 91.13 to 102.3, it has become impossible to play any media with Firefox.

No video will play in youtube, for instance (it just loads endlessly as if it would start, but it doesn't).

Can't use radio websites either. Anything with a "play" button (video or sound) does nothing.

This has been tested with a clean profile, a clean install, after allowing autoplay in the settings.

Is there any info on what exactly changed between ESR 91 and 102 that might explain this ? There has been no system change, If I reinstall 91 instead it works again as usual.

No issues anywhere else on the endpoints (Edge, Windows), this is on Windows 10 if it makes any difference.

Tanks for any help on this.

Hello,

I'm trying to deploy Firefox with several languages.

I followed the guide on [https://support.mozilla.org/en-US/kb/deploying-firefox-language-packs].

Everything work fine until I set up ExtensionSettings policy. This policy hide and block languages menu.

After scratching my head for a while, I finally figured out how to do it. I would to like to know if an easier way to whitelist all locales and dictionaries. I would like to only control the extensions.

<enabled/> <data id="ExtensionSettings" value=' {

 "*": {
   "blocked_install_message": "Blocked by your administrator.",
   "installation_mode": "blocked",
   "allowed_types": ["extensions", "dictionary", "locale"]
 },
 "uBlock0@raymondhill.net": {
   "installation_mode": "force_installed",
   "install_url": "https://addons.mozilla.org/firefox/downloads/latest/ublock-origin/latest.xpi"
 },

"qwantcomforfirefox@jetpack": {

   "installation_mode": "force_installed",
   "install_url": "https://addons.mozilla.org/firefox/downloads/file/3658805/latest.xpi"

}, "langpack-en-CA@firefox.mozilla.org": {

 "installation_mode": "allowed"

}, "langpack-en-GB@firefox.mozilla.org": {

 "installation_mode": "allowed"

}, "langpack-en-US@firefox.mozilla.org": {

 "installation_mode": "allowed"

}, "langpack-es-AR@firefox.mozilla.org": {

 "installation_mode": "allowed"

}, "langpack-es-CL@firefox.mozilla.org": {

 "installation_mode": "allowed"

}, "langpack-es-ES@firefox.mozilla.org": {

 "installation_mode": "allowed"

}, "langpack-es-MX@firefox.mozilla.org": {

 "installation_mode": "allowed"

}, "langpack-fr@firefox.mozilla.org": {

 "installation_mode": "allowed"

}, "langpack-pt-BR@firefox.mozilla.org": {

 "installation_mode": "allowed"

}, "langpack-pt-PT@firefox.mozilla.org": {

 "installation_mode": "allowed"

} }'/>

Thank you

Environment:

• Version: 102.3.0esr
• Build ID: 20220912135840
• OS: Windows_NT 10.0 19044

Issue: I had Firefox window 1 opened in virtual desktop 1, then I switched to virtual desktop 2 and open Firefox window 2 there. After using window 2 for some time, I switched back to virtual desktop 1 and found Firefox window 1 was gone. I checked `about:support` page but found no crash report there. I don't know what's going wrong.

Hello, Qualys is detecting Vulnerabilites on our Firefox ESR 91.12 Versions which were patched by MFSA2022-29.

It is showing Vulnerabilities because MFSA2022-30 lists CVE's for ESR 102.X and we are on 91.12.

Is there anywhere I can go to get a list of all Vulnerabilities on 91.X to show our Security team, I believe CVE-2022-36314 and CVE-2022-2505 are not present in 91.12 because they are not listed in https://www.mozilla.org/en-US/security/advisories/mfsa2022-29/ but need evidence

Thank You,

Good morning,

I'm reaching out to see if I can get some assistance with Firefox on of our network. I'm System Admin at Goodfellow AFB. I've tried searching this issues on the web and found similar issues but solutions that were recommend online have not worked for us. Yes I have uninstalled Firefox completely and installed it from scratch. I know it has something to do with autoconfig file but not sure what exactly I'm looking for. Thanks.

Hello,

I used to deploy add-ons via group policies - this worked like a charm: Firefox esr (91.11.0esr x64), ADMX-templates in Sysvol\PolicyDefinitions, Group Policies: User configuration, administrative templates, mozilla, firefox, add-ons --> install add-ons --> https://addons.mozilla.org/firefox/downloads/file/1234567/goodaddon-1.0.01.xpi

A few months ago, we had to change our network-configuration. We were using a proxy before, but our proxy had direct access to the internet. Now our proxy forwards everything to another proxy. Since about that time, add-on-deployment via gpo doesn't work anymore. It could be something else, but i suspect the proxy-change.

I tried to deploy unc-paths, internal websites and different syntaxes; none of this works:

• http://192.168.100.10/goodaddon-1.0.01.xpi
• http://internalwebsite/goodaddon-1.0.01.xpi
• https://192.168.100.10/goodaddon-1.0.01.xpi
• https://internalwebsite/goodaddon-1.0.01.xpi
• \\192.168.100.20\netshare\goodaddon-1.0.01.xpi
• \\internalfileserver\netshare\goodaddon-1.0.01.xpi
• file://///192.168.100.20/netshare/goodaddon-1.0.01.xpi
• file://///internalfileserver/netshare/goodaddon-1.0.01.xpi

As you can see I tried using internal sites, so that no proxy would be needed. And I also added these sites to the allowed add-on-installation-sites (computer configuration, same group policy). The sites are all accessible; if I enter these addresses as url, firefox can access the xpi-file.

I know how to pack add-ons into the firefox-setup-file; that still works. But first of all, firefox is already installed on most of my clients. Second, after a fresh installation of firefox with this self-created package, all add-ons are installed, but not activated. And I would like to restrict activation/deactivation of add-ons via gpo.

1. 1 Are there other ways to deploy add-ons in a domain-network (e.g. script-based)?
2. 2 Are there any logs where I could find out what exactly goes wrong?
3. 3 Are there any other syntaxes I could try (group policy urls)?
4. 4 Can anyone guess what the problem is (why it is not working anymore)?

Help would be very much appreciated.

Best regards.

Hello,

As the title mentions, applying a block to all extensions via "*" by utilizing Extension Management GPO will block about:debugging.

Is there a way to simultaneously have all extensions blocked and about:debugging available?

Here's the JSON - { "*": { "installation_mode": "blocked" } }

Appreciate your time and help, - Dom

Hi,

We've GPOs in place for Edge and Chrome that set said browsers on all our Windows endpoints to open downloaded ICA files in Citrix Workspace.

I've imported the firefox.admx and mozilla.admx file along with assocaited .adml files, checked Github, checked through the GPO settings yet cannot figure out how to do the same with Firefox.

Is there a Mozila Firefox for Windows GPO ADMX setting I can use to control the "Firefox>Settings>General>Files and Applications>Applications" section to add "Content type: ica | Action: Use Citrix Workspace"?

Thanking you....

Hello! As you may know, FireFox does not use the Windows Certificate Store by default. Therefore I have to change the "security.enterprise-roots.enabled" in the preferences on each workstation. I have searched and found ways to enforce this change by GPE , but I wonder if there is a way to change firefox preferences, especially the one I've mentioned, via Registry Editor.

There is a certificate for an internal website that FireFox is saying is not valid/secure and it makes you add an exception. However, if you use IE, Edge or Chrome it loads fine with the valid CA Certificate. I've cleared all data (cache/etc...) and it hasn't fixed it. Hopefully someone has a fix for this?

Getting "SEC_ERROR_UNKNOWN_ISSUER" for the certificate and its saying:

   Peer’s Certificate issuer is not recognized.
   HTTP Strict Transport Security: false
   HTTP Public Key Pinning: false

FireFox Version: 91.8.0esr (64-bit) Operating System: Windows 10 (64-bit)

I know users are allow to disable http3 through "about:config", and it works.

However, I have to apply to multiple devices by script and the risk page might be a challenge for me.

I tried to edit prefs.js, but it will still be overwrite even I restart my device. (Re-install is not allowed)

Is there any alternative way to disable http3, such as regedit key?

Or is there method to keep pref.js unchangeable?

We have around 1000 Firefox installations on our government organization, all installed via the Firefox MSI installer. Unfortunately, we came late to realize that the Firefox ESR would be a much more suitable product, compared to the normal Firefox branch.

Now, some years ago we would simply mass uninstall the normal Firefox and mass install the (latest) ESR version and all would be well. Problem is that we have to keep existing profiles (including passwords/bookmarks etc), something that is not supported in the latest Firefox builds.

Can anyone offer some advice/"hacks" to accomplish this? Note that whatever we'll do, we'll have to do it automatically, we lack the man-power to do this manually on a system by system basis...

Thanks in advance for any information provided.

Has anything changed in Mozilla Maintenance Service in regards to security required for the logged on user in order for Mozilla updates to be installed? We do not allow our users local admin rights, but instead they have an application where they can request admin rights when needed, and with the release of Firefox 89, we are seeing peoples Mozilla products disappear. In the logs it looks like an update is being made, and once the old version has been deleted, the new version fails to install.

Hello, Please excuse my poor level in English. In my company I deploy FirefoxESR-68.12.0-fr.msi by GPO. I would like to know how to deploy a config file to modify its configuration. More precisely the settings network negotiate-auth delegation-uris and network automatic-ntlm-auth trusted-uris

Thanks for your help

I'm using these instructions for making the FireFox browser the default browser via GPO: https://support.mozilla.org/en-US/kb/make-firefox-enterprise-default-browser#firefox-enterprise:win10: and I'm unable to do so successfully.

When I perform the steps what happens is that no browser becomes the default. Trying to open an html document causes Windows 10 to ask the user to pick which browser they would like to be the default web browser. I can choose Firefox at that point but if I reboot or do a gpupdate /force, the default app for browser goes back to not having one selected.

I can use the same steps to a file at the same network location to make Google Chrome the default browser without issue, but when I switch back to trying to make Firefox the default the same problem returns. I've tried the rapid release version and the ESR version. I have also uninstalled and reinstalled Firefox.

I feel like the issue is related to the default associations xml file from the instructions which states ProgId="FirefoxHTML . If you look in the windows registry, "FirefoxHTML" is not listed as an option for either of these keys: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.html\OpenWithProgIds Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.htm\OpenWithProgIds

If you go here: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\Firefox-308046B0AF4A39CB\Capabilities\URLAssociations

Instead of "FirefoxHTML" it lists "FirefoxURL-308046B0AF4A39CB" for the http and https url associations.

Does anyone have a solution to this problem or another way to make Firefox the default browser for multiple machines remotely?

Our company is using Firefox. We recently have found that you can launch Command Prompt or PowerShell by typing "cmd" or "powershell" into address bar of "Open File" or "Save Page As" menu.

Since we can not accept this behavior for security reasons, we are considering disabling "Open File" and "Save Page As" feature themselves. Is there a way to realize this?

We sought options to disable these features, but could not find any so far. Or If there is alternative solution for this, that would be highly appreciated if you share your knowledge.

moved from Firefox -> Firefox for Enterprise