Import AutoFill form data must be disabled.
This policy forces the autofill form data to be imported from the previous default browser if enabled. If enabled, this policy also affects the import dialog.
If disabled, the autofill form data is not imported.
If it is not set, the user may be asked whether to import, or importing may happen automatically.
How this relates to the STIG checklist: STIG vs SCAP benchmark.