About Privoxy:
https://www.privoxy.org/
Config file on mac:
/usr/local/etc/privoxy/config
listen-address 127.0.0.1:8118
forward-socks5t / 127.0.0.1:1080 .
forward-socks5t / 127.0.0.1:1080 .
Starting and stopping:
cd /Applications/Privoxy
sudo ./startPrivoxy.sh
or
sudo ./stopPrivoxy.sh
workflow:
browser -> http/https agent (8118 privoxy) -> socks5 (1080 shadowsocks) -> web server
more:
http://www.chinagfw.org/2016/11/blog-post.html
https://roxhaiy.wordpress.com/2015/01/11/設置shadowsockstor多重代理/amp/