@burnsl:
Okay, so… i REALLLLY HATE using auto proxy detection stuff, it is a needless delay at each browser start-up.
It's not needless if you want to secure https
squid + squidguard is a good option too but with transparent proxy it will filter only http.
If you want to filter web content, then you probably need dansguardian.
check performance with
squid
dansguardian
squid+squidguard
See what offers better performance and filtering options.