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firefox.exe with system PID listening on tcp 139

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c.pierce83
c.pierce83
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I noticed Firefox listening on port 139. Is this normal? I uninstalled reinstalled and it still does it. This is on a windows 10 computer. My windows 11 computer does not show this. On further inspection the PID for the 139 port is system not Firefox.


Active Connections 

 Proto  Local Address          Foreign Address        State           PID

[firefox.exe] 

 TCP    192.168.1.144:139      0.0.0.0:0              LISTENING        4
I noticed Firefox listening on port 139. Is this normal? I uninstalled reinstalled and it still does it. This is on a windows 10 computer. My windows 11 computer does not show this. On further inspection the PID for the 139 port is system not Firefox. Active Connections Proto Local Address Foreign Address State PID [firefox.exe] TCP 192.168.1.144:139 0.0.0.0:0 LISTENING 4

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