Guide for Firefox

1. Open Tools > Options
   
2. Open Advanced,
   then choose: Network > Settings
   
3. Now choose:
   Manual proxy configuration:
   HTTP Proxy: <Your proxy address> , Port: <The port for Your proxy address>
   No Proxy for: localhost, 127.0.0.1, 172.16.0.0/12, cp.campusnet.ee, chosen_authentication_address
   Chosen authentication address should be the same address which opens when the web browser is launched. This may be for example www.ee.