@ Pondus I ran the "ShieldsUp" test at GRC with both Private Firewall and OA Free. Private Firewall did better. They both failed at the port 443. Which is a https port/connection not http. Private Firewall was much more stealthy than OA Free. For what it's worth.
Dell Inspiron, Win10x64, MalwareBytes Premium--HP Envy Win10x64, MalwareBytes Premium,--Both systems Avast Free v2016.11.1.2235 beta 2, Comodo Firewall v8.2 w/D+, MalwareBytes Anti-Exploit Free, Super Anti-Spyware, Spyware Blaster, MCShield, Unchecky, Firefox (latest build), Chrome (latest build) and, various browser security tools.
"Look before you leap!" Use online scanners before you click on any link.