alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET POLICY Mozilla XPI install files download"; flow:established,to_client; http.content_type; content:"application/x-xpinstall"; startswith; nocase; classtype:bad-unknown; sid:2001114; rev:10; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, updated_at 2024_02_06;)