Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Connections when Firefox is being used

more options

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)

more options

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)