Do not allow authentication preferences to be changed

If this policy is disabled, authentication preferences can be changed by the user.

If this policy is enabled or not configured, authentication preferences cannot be changed by the user.

Supported on: Firefox 71 or later, Firefox 68.3 ESR or later
Registry HiveHKEY_LOCAL_MACHINE or HKEY_CURRENT_USER
Registry PathSoftware\Policies\Mozilla\Firefox\Authentication
Value NameLocked
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

firefox.admx

Administrative Templates (Computers)

Administrative Templates (Users)