Disable Master Password Creation
Supported on: Firefox 60 or later, Firefox 60 ESR or later
Registry
HKLM
Software\Policies\Mozilla\Firefox HKCU
Software\Policies\Mozilla\Firefox Value name: DisableMasterPasswordCreation
Enabled: DisableMasterPasswordCreation = 1
Disabled: DisableMasterPasswordCreation = 0
Description
If this policy is enabled, the user cannot create a master password. If this policy is disabled or not configured, the user can create a master password.