My content script requests two strings from background.html:

var subject = document.getElementById("subject");
var body = document.getElementById("body");

chrome.extension.sendRequest({name: "domain"},
     function(response)
     {
     subject.setAttribute("value", response.domain + ": ");
     });

chrome.extension.sendRequest({name: "url"},
     function(response)
     {
     body.defaultValue = "URL of last page visited: " + response.url;
     });

background.html earlier had saved the data to local storage:

        localStorage["domain"] = site;
        localStorage["url"] = tab.url;

and waits for the requests from the content script:

//Wait for request for the site value and URL from content script
chrome.extension.onRequest.addListener(
  function(request, sender, sendResponse)
  {
  sendResponse({domain: localStorage["domain"]});
  });

chrome.extension.onRequest.addListener(
  function(request, sender, sendResponse)
  {
  sendResponse({domain: localStorage["url"]});
  });

For some reason, the content script receives the "domain" value OK,
but displays "undefined" for the "url" value. TIA.

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