Bug 1008825 - Synchronous XMLHttpRequest to load options.xul. r=wesj

mobile/android/chrome/content/aboutAddons.js

@@ -330,8 +330,8 @@ var Addons = {
     try {
       let optionsURL = aListItem.getAttribute("optionsURL");
       let xhr = new XMLHttpRequest();
-      xhr.open("GET", optionsURL, false);
+      xhr.open("GET", optionsURL, true);
-      xhr.send();
+      xhr.onload = function(e) {
         if (xhr.responseXML) {
           // Only allow <setting> for now
           let settings = xhr.responseXML.querySelectorAll(":root > setting");
@@ -339,8 +339,9 @@ var Addons = {
             for (let i = 0; i < settings.length; i++) {
               var setting = settings[i];
               var desc = stripTextNodes(setting).trim();
-            if (!setting.hasAttribute("desc"))
+              if (!setting.hasAttribute("desc")) {
                 setting.setAttribute("desc", desc);
+              }
               box.appendChild(setting);
             }
             // Send an event so add-ons can prepopulate any non-preference based
@@ -358,6 +359,8 @@ var Addons = {
             aListItem.setAttribute("optionsURL", "");
           }
         }
+      }
+      xhr.send(null);
     } catch (e) { }
 
     let list = document.querySelector("#addons-list");