Proximodo is a loopback proxy server, seemingly a fork of proxomitron though likely abandonware. Unlike Proxomitron its developer is not existentially challenged. Additionally Proximodo can use Proxomitron filters. Unfortunately it does not support SSL connections. This could be one answer to browser fingerprinting. It is a less browser-intensive mode of adBLOCKing / adBLOCK / adBLOCKer.