1. Log in to Cisco ASDM -> Device Management -> Configuration -> Logging Setup -> Enable the ID 304001 (HTTP Inspection) and make sure it is set to 'Informational'.
2. Go to Configuration -> Service Policy Rules.
3. Go to Edit -> Rule Actions -> Protocol Inspection and enable 'HTTP' and click on Apply.
4. Now go to Firewall Analyzer and check for URL reports -> URL will be listed.