A URL filtering profile is a collection of URL filtering
controls that you can apply to individual security policy rules
to enforce your web access policy. The firewall comes with a default
profile that is configured to block threat-prone categories, such
as malware, phishing, and adult. You can use the default profile
in a security policy, clone it to be used as a starting point for
new URL filtering profiles, or add a new URL filtering profile.
You can then customize the newly-added URL profiles and add lists
of specific websites that should always be blocked or allowed. For
example, you may want to block social-networking sites, but allow
some websites that are part of the social-networking category.