I just updated Firefox to 12.0 & discovered that the ZA Free Security Engine Extension has become disabled due to its incompatibility. However, my ZA Free Firewall itself still appears to be running fine. Now being that I visit a VERY limited number of websites, all of which I know are safe. Should I be concerned & role back to Firefox 11 just so this extension works?

P.S: My apologies if I have created a thread similar to this in the past, I've looked but cannot find.