Firefox updates are controlled by a registry key:
HKEY_LOCAL_MACHINE\Software\Policies\Mozilla\Firefox
And a value:
Value: DisableAppUpdate
Type Dword (32-bit).
Data: 1.
When 1 is selected the Firefox updates will be disabled.
Create a Registry element with this configuration:
Action: Write Value
Hive: HKEY_LOCAL_MACHINE
Key: Software\Policies\Mozilla\Firefox
Type REG_DWORD
Value: DisableAppUpdate
Data: 1
And use the validation logic to apply this element to desired computers, save the element and replicate the changes.
