@ 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, Win7x64 SP1, Comodo Firewall 5.12 w/D+, MalwareBytes Free 2.1--HP Envy Win8.1x64, Private Firewall, MalwareBytes Premium 2.1--Both systems Avast Free v2015.10.2,2218, Super Anti-Spyware, Spyware Blaster, MCShield, Unchecky, Firefox (latest build), Google Chrome (latest build) and, various browser security tools.
When you do something, do it with a purpose and do it on purpose.