www prefix does not work on nop 3.4

Actually, I think this only worked for Chrome.

For those who are having difficulties with versions older than 3.9. The problem for me was to specifically set the security url. You must leave it blank in store configuration (or put without 3w to hack the logic) for nopcommerce to automatically detect it. Because before he checks whether or not 3w exists, he uses the url saved in this field, according to the method GetStoreHost:

result = !String.IsNullOrWhiteSpace(currentStore.SecureUrl) ?
                        //Secure URL specified.
                        //So the store owner doesn't want it to be detected automatically.
                        //In this case let's use the specified secure URL
                        currentStore.SecureUrl :
                        //Secure URL is not specified.
                        //So the store owner wants it to be detected automatically.
                        result.Replace("http:/", "https:/");