More on suppressing upgrades on Firefox

This is how to set up a cfg file to set preferences before firefox launches.  Unknown what versions it works with.

https://support.citrix.com/article/CTX223921

Locking Preferences 
Disable    Automatic    Updates     
Firefox, by default, will want to automatically update itself. If Firefox is allowed to do this, the updates will go into the personalization layer and thereby bloat the personalization with unnecessary updates. It is best to turn off automatic updates completely. Note these settings are not required if you also use the option to configure a Default Profile and disable updates there. 

To disable automatic updates within Firefox, you must create and edit two files. The first file needs to be located under "c:\program files\mozilla firefox\defaults\pref". The file will be called ‘local-settings.js’. 

 Enter the lines below into the file (The first line is only needed if you do not want to obscure the content 
with ROT-13): 
pref("general.config.obscure_value",    0); 
pref("general.config.filename",    "mozilla.cfg"); 

The second file needs to be located under "c:\program files\mozilla firefox". The file name must be mozilla.cfg. Add the five lines in as specified below: 
 // 
lockPref("app.update.auto",    false); 
lockPref("app.update.enabled",    false); 
lockPref("startup.homepage_welcome_url",    ""); 
lockPref("startup.homepage_override_url",    ""); 

The first lockPref is to turn off the auto update mechanism. The second lockPref statement is to turn off all other update features. The third lockPref statement is to disable the welcome page. The fourth lockPref is to disable the redirect when a new version is installed. If you do not disable the welcome page and redirect, Firefox will automatically check for a new version using the welcome page and direct users to download the latest version.  

Disabling these features does not prevent a user from manually updating Firefox. It simply disables the auto update mechanism. 




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