If you have any social plugins, they may do that.
So this is somewhat of a strange issue. I have a program called PeerGuardian 2 and it allows me to simplistically see the packets being sent to and from devices on my home network. It's showing that my computer is sending packets to random IP addresses, some of them reoccur, on a massive range of ports all going in order.
From 192.168.1.253:6812 - To 126.96.36.199:80
From 192.168.1.253:6813 - To 188.8.131.52:80
From 192.168.1.253:6814 - To 184.108.40.206:80
From 192.168.1.253:6815 - To 220.127.116.11:80
From 192.168.1.253:6816 - To 18.104.22.168:80
From 192.168.1.253:6817 - To 22.214.171.124:80
This happens in spurts and it usually sends 20-40 to varying IP addresses in a matter of a few seconds. I asked my ISP if they understood what this was and it stumped the technician I spoke with. I also have run multiple virus/malware scans and everything comes up clean.