Set up proxy in the browsers that your prefre at the left menu.

Setting up Opera to use proxy servers

Opera

  1. Proxy server settings are found in "Tools";
  2. Click "Preferences";
  3. Click "Advanced";
  4. Click "Network" (Mac: Opera > "Preferences" > "Advanced" > "Network").
  5. Click the "Proxy servers"; button to open the proxy settings dialog.
Free proxy list