iftop, outgoing https to Amazon

When I run iftop -P to see what is coming to/from my interface, I constantly see connections to Amazon, HTTPS protocol: => ec2-176-34-135-167.eu-west-1.compute.amazonaws.com:https ec2-52-22-162-249.compute-1.amazonaws.com:https 216.58.209.78:443 (ESTABLISHED) iceweasel 8596 user 47u IPv4 90186 0t0 TCP 192.168.0.15:51544->52.25.142.225:443 (ESTABLISHED) iceweasel 8596 user 53u IPv4 86275 0t0 TCP 192.168.0.15:42090->52.32.59.229:443 (ESTABLISHED) iceweasel 8596 user 55u IPv4 90184 0t0 TCP 192.168.0.15:50570->52.11.148.42:443 (ESTABLISHED) iceweasel 8596 user 56u IPv4 87223 0t0 TCP 192.168.0.15:44370->54.187.136.191:443 (ESTABLISHED) Hmm, there is Google too, maybe those are search engines updates? NO. I disabled search engines autoupdates and restarted the browser. I also disabled Firefox (Iceweasel) Sync service, didn't help (I thought that maybe they store my data in Amazon cloud).