If this policy is enabled, telemetry is not uploaded.
If this policy is disabled or not configured, telemetry is collected and uploaded.
Mozilla recommends that you do not disable telemetry. Information collected through telemetry helps us build a better product for businesses like yours.
Starting with Firefox 62, this policy will only work from Computer Configuration.
|Registry Hive||HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER|