As the original developer of Disconnect, on which Focus’s blocking is said to be based, I (with my development team) created a new, open-source ad blocker for Chrome, Opera, and iOS called Adblock Fast (http://adblockfast.com/ and https://github.com/rocketshipapps/adblockfast on GitHub) because I think Disconnect became abandonware after I left the project a year and a half ago – there was one commit made to Disconnect in 2015 (https://github.com/disconnectme/disconnect/commits/master).