I have recently upgraded my desktop machind from ubuntu 16.04 to ubuntu 16.10 and after reboot some of the websites are not working.
Edit /etc/NetworkManager/NetworkManager.conf with the following command
gksu gedit /etc/NetworkManager/NetworkManager.conf
Enter in your password when prompted.
Comment out the line dns=dnsmasq
and then restart Network Manager using the following command
sudo restart network-manager
If you get /com/ubuntu/upstart: Connection refused error try the following command
sudo service network-manager restart
Restart dnsmasq service using the following command
sudo service dnsmasq restart
Edit /etc/nsswitch.conf file
gksu gedit /etc/nsswitch.conf
and change the following line
hosts: files resolve [!UNAVAIL=return] mdns4_minimal [NOTFOUND=return] dns
hosts: files mdns4_minimal [NOTFOUND=return] resolve [!UNAVAIL=return] dns
Save and exit the file
If you have any other solution worked for you please share with us.