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Connections when Firefox is being used

user226514887665625432230708206477982186438
user226514887665625432230708206477982186438
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While using Firefox 48. on my Mac Os running Yosemite When I opened Firefox without entering any URL address I performed a lsof-i command to show al network connections and got the following.

lsof -i COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME UserEvent 270 Mac 4u IPv4 0xbe811fd3315c69b 0t0 UDP *:* SystemUIS 292 Mac 20u IPv4 0xbe811fd3315b183 0t0 UDP *:58214 SystemUIS 292 Mac 22u IPv4 0xbe811fd3315af2b 0t0 UDP *:* SystemUIS 292 Mac 27u IPv4 0xbe811fd3c4cd2bb 0t0 UDP *:* sharingd 318 Mac 9u IPv4 0xbe811fd35151513 0t0 UDP *:* com.apple 346 Mac 6u IPv4 0xbe811fd351512bb 0t0 UDP *:* WiFiAgent 434 Mac 16u IPv4 0xbe811fd35151063 0t0 UDP *:* firefox 85437 Mac 33u IPv4 0xbe811fd3dfa772b 0t0 TCP 10.10.10.101:58632->72.21.91.29:http (ESTABLISHED) firefox 85437 Mac 55u IPv4 0xbe811fd3df47b1b 0t0 TCP 10.10.10.101:58631->ec2-52-88-118-150.us-west-2.compute.amazonaws.com:https (ESTABLISHED) firefox 85437 Mac 56u IPv4 0xbe811fd3df49e5b 0t0 TCP 10.10.10.101:58633->server-54-192-50-93.jfk5.r.cloudfront.net:https (ESTABLISHED)

Why does Firefox have 3 connections when I have not entered any URL address?

While using Firefox 48. on my Mac Os running Yosemite When I opened Firefox without entering any URL address I performed a lsof-i command to show al network connections and got the following. lsof -i COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME UserEvent 270 Mac 4u IPv4 0xbe811fd3315c69b 0t0 UDP *:* SystemUIS 292 Mac 20u IPv4 0xbe811fd3315b183 0t0 UDP *:58214 SystemUIS 292 Mac 22u IPv4 0xbe811fd3315af2b 0t0 UDP *:* SystemUIS 292 Mac 27u IPv4 0xbe811fd3c4cd2bb 0t0 UDP *:* sharingd 318 Mac 9u IPv4 0xbe811fd35151513 0t0 UDP *:* com.apple 346 Mac 6u IPv4 0xbe811fd351512bb 0t0 UDP *:* WiFiAgent 434 Mac 16u IPv4 0xbe811fd35151063 0t0 UDP *:* firefox 85437 Mac 33u IPv4 0xbe811fd3dfa772b 0t0 TCP 10.10.10.101:58632->72.21.91.29:http (ESTABLISHED) firefox 85437 Mac 55u IPv4 0xbe811fd3df47b1b 0t0 TCP 10.10.10.101:58631->ec2-52-88-118-150.us-west-2.compute.amazonaws.com:https (ESTABLISHED) firefox 85437 Mac 56u IPv4 0xbe811fd3df49e5b 0t0 TCP 10.10.10.101:58633->server-54-192-50-93.jfk5.r.cloudfront.net:https (ESTABLISHED) Why does Firefox have 3 connections when I have not entered any URL address?

All Replies (1)

user226514887665625432230708206477982186438
user226514887665625432230708206477982186438 Question owner
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I have performed the same test with my Add ons disabled and got the folowing when entering lsof -i.

lsof -i COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME UserEvent 270 Mac 4u IPv4 0xbe811fd3315c69b 0t0 UDP *:* SystemUIS 292 Mac 20u IPv4 0xbe811fd3315b183 0t0 UDP *:58214 SystemUIS 292 Mac 22u IPv4 0xbe811fd3315af2b 0t0 UDP *:* SystemUIS 292 Mac 27u IPv4 0xbe811fd3c4cd2bb 0t0 UDP *:* sharingd 318 Mac 9u IPv4 0xbe811fd35151513 0t0 UDP *:* com.apple 346 Mac 6u IPv4 0xbe811fd351512bb 0t0 UDP *:* WiFiAgent 434 Mac 16u IPv4 0xbe811fd35151063 0t0 UDP *:* firefox 85494 Mac 51u IPv4 0xbe811fd3d86472b 0t0 TCP 10.10.10.101:58772->ec2-52-26-2-199.us-west-2.compute.amazonaws.com:https (ESTABLISHED) firefox 85494 Mac 52u IPv4 0xbe811fd3dfa772b 0t0 TCP 10.10.10.101:58773->72.21.91.29:http (ESTABLISHED) firefox 85494 Mac 53u IPv4 0xbe811fd3e28f72b 0t0 TCP 10.10.10.101:58774->72.21.91.29:http (ESTABLISHED) firefox 85494 Mac 54u IPv4 0xbe811fd3dfdd58b 0t0 TCP 10.10.10.101:58775->server-54-192-50-97.jfk5.r.cloudfront.net:https (ESTABLISHED) firefox 85494 Mac 55u IPv4 0xbe811fd3dfa53eb 0t0 TCP 10.10.10.101:58776->ec2-52-26-2-199.us-west-2.compute.amazonaws.com:https (ESTABLISHED)