ASA to Firepower migration
Cisco has developed a Firepower migration tool, which is a utility that converts supported ASA configurations to supported Firepower Threat Defense (FTD) platform configurations. This utility helps automate the migration of supported ASA features and policies. You may have to manually migrate any unsupported features.
The migration tool can be used in conjunction with ASA to Firepower reimaging to convert a compatible ASA platform to an FTD platform.