You can export the Firewall policies to a local file system.
Steps:
Click the Policy tab.
From the Domain drop-down list, select the domain you want to work in.
Select Intrusion Prevention → Advanced → Policy Export → Firewall.
Select the policies to export and click Export. The selected policies are all exported as one .xml file. You can then import this .xml file into a Manager of the same version.
Note
Using this export feature, you can only export Firewall policy definitions. If a policy is assigned to a Sensor, ports, interfaces, or subinterfaces, and if you want to export this assignment as well, then you need to do a Sensor configuration export.