I am building a new website on an Ubuntu 20.04 server with a LEMP stack. To test the web server (nginx) I set up a simple test site named nginxtest.com. Nginx server block tests are successful and there are no errors in any logs, so it appears that it is working properly. However, when I attempt to show the site by putting the site name into Firefox, all I get is a notice from Verizon that it has no knowledge of the website (which it shouldn't as it's not a registered name). I want FIrefox to search localhost for my test site, but the only way I can make it work is to change the network-dns-native-is-localhost setting to true (default is false) in the about:config settings. When I change that setting, my test site pops right up, but then I can't reach any site on the internet. How can I force Firefox to direct web searches to localhost before going out to the internet?