I am a fan of Privoxy and initially had some problems on Fedora 15 in that privoxy failed to start on boot.
A work around is to enable both privoxy and network service at boot.
su -c "systemctl enable privoxy.service"
su -c "systemctl enable network.service"
It seems to me that privoxy should start on the default port without having to enable the network script. to that end I have an open Bug report .