Auto-detect proxy settings for this network: Choose this if you want Firefox to automatically detect the proxy settings for your network. 

   Manual proxy configuration: Choose this if you have a list of one or more proxy servers. 

       If the same proxy name and port number are used for all proxies, check Use this proxy server for all protocols.
       No Proxy For: List of hostnames or IP addresses that will not be proxied. 

   Automatic proxy configuration URL: Choose this if you have a proxy configuration (.pac) file. Enter the URL and click okay to save changes and load the proxy configuration.
       Reload: The reload button will load the currently available proxy configuration.

No proxy: This is the default tùy chọn. Choose this if you don't want to use a proxy. Auto-detect proxy settings for this network: Choose this if you want Firefox to automatically detect the proxy settings for your network. Manual proxy configuration: Choose this if you have a list of one or more proxy servers. Ask your system administrator for the configuration information. Each proxy requires a hostname and a port number. If the same proxy name and port number are used for all proxies, check Use this proxy server for all protocols. No Proxy For: List of hostnames or IP addresses that will not be proxied. Automatic proxy configuration URL: Choose this if you have a proxy configuration (.pac) file. Enter the URL and click okay to save changes and load the proxy configuration. Reload: The reload button will load the currently available proxy configuration.