These commands are more easier and manageable
wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm rpm -Uvh epel-release-6-8.noarch.rpm yum install privoxy -y
In future if you want to update
yum update privoxy -y
Ref: http://pkgs.org/centos-6/epel-x86_64/privoxy-3.0.21-3.el6.x86_64.rpm.html