alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY Unsupported/Fake FireFox Version 0."; flow:to_server,established; threshold:type limit,track by_src,count 2,seconds 60; http.user_agent; content:" Firefox/0."; nocase; classtype:policy-violation; sid:2016875; rev:5; metadata:created_at 2013_05_21, confidence High, signature_severity Informational, updated_at 2020_04_24;)