Privoxy is a "privacy enhancing proxy", filtering web pages and removing advertisements.
[3] Privoxy is based on the Internet Junkbuster and is released under the GNU General Public License.
It runs on Linux, OpenWrt, DD-WRT, Windows, macOS, OS/2, AmigaOS, BeOS, and most flavors of Unix.
Privoxy still works if manually configured and is still recommended for third party non-browser applications which do not natively support SOCKS.
[5] Shashank Sharma of Linux Format rated it 9/10 stars and wrote, "Privoxy is highly customisable, easy to set up, has good documentation and is fun to work with.