Our fix:
In our environment, we have installed a clean version of Firefox on a system, 
opened, and then imported our certs
Prior to starting, get the cert8.db file from the computer with the clean 
version above
Create Autoconfig.js file with the following entries:

//
pref("general.config.filename", "Mozilla.cfg");
pref("general.config.obscure_value", 0);

Create a Mozille.cfg file with all of our configurations. You would include 
your setting for .sip, similar to this:

lockPref("network.protocol-handler.expose.sip", false);

Create a script to do the following:

1.       Remove all previous versions of Firefox

2.       Make sure install folder is completely removed

3.       Delete cert8.db file from all user profiles

4.       Install current version

5.       Copy the files created above to the various locations:

-          Autoconfig.js copied to C:\Program Files (x86)\Mozilla 
Firefox\defaults\pref\

-          Mozilla.cfg copied to C:\Program Files (x86)\Mozilla FireFox\browser\

-          Mozilla.cfg copied to C:\Program Files (x86)\Mozilla FireFox\

-          cert8.db copied to C:\Program Files (x86)\Mozilla 
Firefox\browser\defaults\profile\

-          cert8.db copied to each user’s profile from where it was removed 
above

Not sure if this is *the* correct way to do this, but it worked for us. Hope it 
helps

From: Enterprise <[email protected]> On Behalf Of Yohanim
Sent: Tuesday, April 24, 2018 5:13 AM
To: [email protected]
Subject: [Mozilla Enterprise] Preconfigurered Firefox ESR for organization 
(Custom Default Configuration)

To whom it may concern,
Let me introduce, my name is Yohan. I've some question about deploying firefox 
in Enterprise Environment.

Every laptop on our organization are installed with softphone apps which is 
x-lite. Thus, we had developing some portal on web to make it easier make some 
call. Basically the portal contains sip link with some number followed by 
colons.

Our orginzation use Firefox ESR 52.7.3. To make firefox able to handle sip 
protocol, we add some configuration on about:config as bellow

    network.protocol-handler.expose.sip -> Value -> false

After that, whenever our user click some sip link, the browser would triggered 
x-lite application. At the first time, the pop up launch application will be 
shown and then end user will choose default application to handle sip link.

Our client running on Windows Machine.

However, for our user to change about:config and choose default application 
launcher are hard to do. Hence we need to develop simply way to approach that.

So we think to make a pre-configured Firefox ESR which is comes with custom 
build configuration and default launch application are the solution for our 
problem.

I had read from several article that talk about deploying firefor for 
enterprise that comes with some configuration on default/pref as this link 
refer 
https://developer.mozilla.org/en-US/Firefox/Enterprise_deployment_before_60#Configuration.
 But the Firefox it self aren't ready to download.

However, Is it that any possible way to pre-configured installed? How to 
customize the installer?

Thanks

[https://lh4.googleusercontent.com/x-XXWb614Zh49ixe0GySnZFBXTBs2gzMCyVmAdh4_dSwrqW_4nmq3hq5TtPRFPJaj4I125-ehGvHxPKhiC07EhRK9VvfIKCWXcJsZd-WfCMgO5MK_7BhYEibHo3L_R0PqKgGAGjh]


Yohanes Agung Immanuel

Google Android Engineer, JAPAC, Google Cloud

[email protected]<mailto:[email protected]>

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