If you are upgrading from previous releases, be sure to follow the upgrade instructions at Upgrade article. After uninstall of previous version of Web Safety you MUST MANUALLY REMOVE websafety user and group, reboot your pfSense box and add websafety user and group again!!!
This article will explain how to install and configure Squid Proxy server capable of filtering encrypted HTTPS connections using Web Safety ICAP content filtering server running on pfSense Firewall 2.4 (64-bit). Being able to look into HTTPS contents greatly increases your ability to control what is allowed and accepted within your network while keeping inappropriate contents away.