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

Proxy Settings in Mozilla

Mozilla

  1. Click "Edit" \ "Preferences";
  2. Click "Category" \ "Advanced" \ "Proxies";
  3. Set "Manual proxy configuration";
  4. Click "View" at "Manual proxy configuration";
  5. Set proxies for following protocols: HTTP, FTP, etc.
Free proxy list