Latest Iceweasel 37 user agents:

User Agent	Platform	Device
Mozilla/5.0 (X11; Linux x86_64; rv:37.0) Gecko/20100101 Firefox/37.0 Iceweasel/37.0.1	GNU/Linux	Unknown
Mozilla/5.0 (X11; Linux i686; rv:37.0) Gecko/20100101 Firefox/37.0 Iceweasel/37.0.2	GNU/Linux	Unknown