Get the latest stable release 4.2.0.CBF4 with new reporting module and improved Web UI, released on August 1st, 2015.
Next version of Web Safety with even better reporting module.
Current version of Web Safety for Squid proxy supports FreeBSD and pfSense 2.1.5. Default Squid package that comes with this OS does not include ICAP module so you would need to install Squid from ports.
Web Safety for Squid Proxy supports native installation on most well-known Linux distributions, including RedHat, CentOS, Raspberry PI, Debian and Ubuntu.