"WebExtension based browser extension to manage and block untrusted parts of the Web API" (ib., 2017-11-18)
"Postfwd plugin for blocking international spam botnets based on geographical location of IP addresses used to login to postfix via sasl." (ib.) Actually, this plugin locks out logins to compromised accounts once it counts too many logins from too many countries.
"An efficient blocker for Chromium and Firefox"
Configuration changes unfortunately require re-compilation, otherwise neat.