Password Manager
Supported on: Firefox 70 or later, Firefox 68.2 ESR or later
Registry
HKLM
Software\Policies\Mozilla\Firefox HKCU
Software\Policies\Mozilla\Firefox Value name: PasswordManagerEnabled
Enabled: PasswordManagerEnabled = 1
Disabled: PasswordManagerEnabled = 0
Description
If this policy is disabled, the password manager is not available via preferences. If this policy is enabled or not configured, the password manager is available via preferences.