Hi
You should look at Firefly-specific release notes
http://www.juniper.net/techpubs/en_US/firefly12.1x47/information-products/topic-collections/firefly-perimeter/firefly-perimeter-release-notes.pdf
UTM and IDP Licensing
Currently Firefly Perimeter does not need a license activation key to activate the licenses for security features or subscription services.
To continue using Firefly Perimeter or any of the services like UTM and IDP after the 60-day evaluation period, you must purchase licenses. Use of the features beyond the evaluation period is prohibited. Enforcement and auditing are possible for anyone using the features as per the Juniper Networks EULA agreement.
Anti-spam (AS) - Yes
AV Full - No
AV Sophos - Yes
Content filtering (CF) - Yes
Web filtering (WF) - Yes
EWF - Yes
WELF logging - Yes
Chassis cluster - Yes
Transparent mode - No
Express Antivirus (Express AV) - No