10.6.8 and I usually use Firefox.
You are running OSX Snow Leopard... JAVA is not a default install on your machine unless you installed it for some application you needed. . . and even then the JAVA for the Snow Leopard version was updated. I sincerely doubt you had the Flashback trojan... your Mac would have warned you against installing it. Only Leopard and earlier were vulnerable to this particular incarnation of the malware.