The actual IPS-version (which is 7.0(8) at the moment) supports IPv6 for traffic-inspection (it was added long time ago). But the IPS-Appliances and -modules don't support IPv6 for management. So your management-networks can't be IPv6 only.
It's hard to find official statements for IPv6-compliance, but it's mentioned on the data-sheet:
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...