I have Online Armor premium on two all but identical computers. one runs Firefox as default browser. The other runs google Chrome. OA works well on both. OA is a bit of extra work with the user regularly being requested to make judgments on software passing back and forth through gateway (UDP, TCP). This is okay, good practice, and just have to learn the commands and where what or when is appropriate to master it. Always google anything to check up, what is, and how is used. OA has the learn mode feature as well, which seems to work well and adds that behavioral element, 'fingerprint', to the security seam.
Outpost 2009 has this autolearn feature in their free edition and it is all you need to run that firewall, which is a very simple firewall. And works very well.
OA shield is a very reputable security product with strong database facility (oasis) to back up the internet gateway.
