i tried it. dont like it and dont see myself using it regularly. i only keep the add-ons i really find i need. i dont want my firefox to become bloatware.
i found redhat good for hosting a sendmail server. i planned to use it to host my domain but i was too comfortable with Solaris 9 and sun/one webserver that i never gave linux a try webhosting. i am testing the latest ubuntu on an older i586box, just having difficulty with some drivers.
i have used kapersky, norton, mcafee, and nod32 and found nod32 to run the best on a windows box. its lightweight, doesn't eat up resources, available in 64bit and has plenty of configuration.