The issue with this screenshot is that a process of the game is still running when you close the game, said process imitates the name of another programm and then continues using ressources on the pc when it's on, and those can stack and seriously slow down your pc, and we can'T really tell what it does with the ressources it claims.
Awhile later..
I still don't know what you're highlighting in the picture. The tooltip saying "growthrpg.com" is from the firefox.exe instance, which presumeably is you visiting the growthrpg website. The other svchost services are all part of windows.
It looks like the networkservice instances are doing mdns lookups on your local network (that's what ff02::fb is) or doing dns lookups (that's what the cdns02.comcast.com connection is).
Again, that's all normal behavior... svchost networks services will always be there, firefox will be there until 2-3 minutes after you close firefox. Note that connections don't disappaear from the performance monitor for a few seconds to minutes after closing the program... open firefox visit a few websites, close it, and watch how loing its listing sticks around.