https://12.0.0.1:44330

   http://127.0.0.1:1790

    $.ajax({
   		    async: true,
               crossDomain: true,
               url: "http://127.0.0.1:1790/TestService/TestMethod",
               method: "GET",
               headers: {
                       "Access-Control-*": "*",
                       "cache-control": "no-cache"
               },
   			success: function (response) {},
   			error: function (response) {
                               debugger;
                               console.log(response);
                           }
   			});

   Cross-Origin Request Blocked: 
   The Same Origin Policy disallows reading the remote resource at http://127.0.0.1:1790/TestService/TestMethod. (Reason: CORS request did not succeed)

I am basically bit lost. So scenario is I have a Web application(ASPNet Core) which runs on https://12.0.0.1:44330 Also have Window Application that runs on local port as http://127.0.0.1:1790 So you I am trying to call from Web application using ajax call to the Window Application as below $.ajax({ async: true, crossDomain: true, url: "http://127.0.0.1:1790/TestService/TestMethod", method: "GET", headers: { "Access-Control-*": "*", "cache-control": "no-cache" }, success: function (response) {}, error: function (response) { debugger; console.log(response); } }); ***The below call is perfectly working in Chrome But When I try to run same in fireFox (Version 64.0.2)*** it is going in error function of `ajax` to `statusCode 1` as `Message "Error"`. Can any one help how can I run self-hosted service into another Web application in Firefox Getting Warning in FireFox as Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://127.0.0.1:1790/TestService/TestMethod. (Reason: CORS request did not succeed) .