As soon as you open a web page, Fennec (Firefox for android) is opening a UDP socket on a random port. What is this socket and why is it needed?
cat /proc/net/udp
sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode ref pointer drops
361: 00000000:ABC2 00000000:0000 07 00000000:00000000 00:00000000 00000000 10074 0 61366 2 00000000 0
netstat
Proto Recv-Q Send-Q Local Address Foreign Address State
udp 0 0 0.0.0.0:43970 0.0.0.0:* CLOSE
The problem is that it never gets closed as long as Firefox is open and this is failing Google's CTS compliance.