I am attempting to run google chrome on a headless server, controlled by selenium. I need to use a forward proxy (squid in this case) for my tests. Is there a way to include the authenticating username and password to the proxy so that I don't need to authenticate myself? I am using the command line flag --proxy-server="host:port" to specify the proxy. The convention --proxy-server="username:password@host:port" results in an error "no supported proxies" in the dev tools console. Is there a command line argument I can use or a setting somewhere that I can set to auto authenticate? Keep in mind that the server is headless, I can't navigate to chrome://flags or something within the chrome window to set the password.