PAN-OS 9.0 XFR is an accelerated feature
release for the VM-Series firewall. XFR releases deliver new features
for the VM-Series firewalls more frequently than a regular PAN-OS
release to keep up with the pace of change in the public and private
Features introduced in an XFR release will be merged into PAN-OS
regular releases at the next major PAN-OS release. Therefore, if
you upgrade to an XFR release, you must stay on XFR releases to
keep XFR specific features until the next major PAN-OS release.
Review important information about new features, open issues
and workarounds, and issues addressed in each version of PAN-OS
9.0 XFR. See the PAN-OS Release Notes for
information on the regular PAN-OS releases.