"URL Reputation" option is added to Intrusion Prevention policy from Symantec Endpoint Protection (SEP) 14.3 RU1.
Access to following URL should be blocked and detected as SID 60501, but it is not blocked or detected with Microsoft Edge and Mozilla Firefox.
URL for testing "URL Reputation": http://testrating.webfilter.bluecoat.com/Malicious%20Sources/Malnets?locale=en_US
Status of "URL Reputation" option can be checked at following menu.
Menu on SEP Client:
[Change Settings] > [Configure Settings] of "Network and Host Exploit Mitigation" > [Intrusion Prevention]
Menu on Symantec Endpoint Protection Manager (SEPM):
[Clients] > select the client group > [Policies] > open edit window of "Intrusion Prevention policy" > [Intrusion Prevention]
Symantec Endpoint Protection 14.3 RU1 or later
Microsoft Edge and Mozilla Firefox are not supported browser of URL Reputation.