El mensaje de popup.js se publica dos veces en background.js, pero no obtengo absolutamente nada de background.js.

background.js

function login(username,password){

    console.log(username);
var xhr = new XMLHttpRequest();

xhr.open("POST", "http://localhost:3000/login/", true);
xhr.setRequestHeader('Content-type','application/json; charset=utf-8');
data = {"username":username,"password":password};
console.log(JSON.stringify(data));
xhr.send(JSON.stringify(data));
xhr.onreadystatechange = function() {
  if (xhr.readyState == 4) {
    // JSON.parse does not evaluate the attacker's scripts.
    var resp = JSON.parse(xhr.responseText);
    console.log(resp);
    var lStorage = localStorage;
    localStorage.setItem("username",resp["username"]);
    localStorage.setItem("apiKey",resp["apiKey"]);
    localStorage.setItem("password",resp["password"]);
    console.log(localStorage.getItem("username"));



  }
};


}


chrome.extension.onRequest.addListener(
    function(request, sender, sendResponse){
        console.log("hello");
        if(request.msg == "login") {
            //alert(request.password);
            login(request.username,request.password);}
    }
);

  chrome.extension.onConnect.addListener(function(port) {
  console.log("Connected .....");
  port.onMessage.addListener(function(msg) {
        console.log("message recieved "+ msg);
        port.postMessage("Hi Popup.js");
  });
});

popup.js:

function login(){
alert(document.login.username.value);
chrome.extension.sendRequest({ msg: "login",username:document.login.username.value,password:document.login.password.value});
document.getElementById('openBackgroundWindow').visbility = "hidden";

}

$(document).ready(function (){

checkUserAuth();
console.log("Inside");
$("#openBackgroundWindow").click(login);

});


function checkUserAuth(){
console.log(localStorage.getItem("apiKey"));
if(localStorage.getItem("apiKey") != null)
    {
        $("#openBackgroundWindow").visbility ="hidden";
    }
}


var port = chrome.extension.connect({name: "Sample Communication"});
port.postMessage("Hi BackGround");
port.onMessage.addListener(function(msg) {
        console.log("message recieved"+ msg);
});