firefox cannot access hotmail account although all other net functions are ok:
"Server not found      Firefox can't find the server at sn135w.snt135.mail.live.com.  
    Check the address for typing errors such as ww.example.com instead of www.example.com
    If you are unable to load any pages, check your computer's network connection.
    If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web"
please reply to gmail address (*** Email address is removed for privacy ***), since hotmail useless...
even if my network connection is alright, outlook can't sync my mailbox since 9/19. I don't know what is wrong...maybe the fact that I moved to University. Thanks for your time, cheers!

All,

I tried everything to remove third party network connection.

I already tried previous solutions posted in this community.

Still, I couldn't solve the problem. 

How can I remove third party connection?

 

I cannot see anything in "Manage apps and services"

It said "You haven't given access to any apps or services yet. Once you do, they'll show up here."
 
In edit profile, there isn't connected service. However, there is third party network connection in "content from thid-party networks."
I have no connection to this third party network, but I cannot remove it.
Please help.