Well, we can't know everything can we - I certainly can't
You can ping - this means that ping works and if you use an some http://www.****
and not an IP ping has name resolution. Name resolution is the process that translates things like http://www.linuxmint.com
to an IP (188.8.131.52) and so makes it possible to use the net
The settings in your computer probably points to your modem/router as a DNS server (name server)
Your modem/router transfers the name resolution it finds on the internet to your computer.
For reasons I don't understand sometimes some applications can't use that and if you point your network to the name servers on the net these applications get name resolution
I have this problem in some of my installed Mint but not in some....