--- a/browser/components/loop/MozLoopAPI.jsm
+++ b/browser/components/loop/MozLoopAPI.jsm
@@ -7,32 +7,38 @@
 const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
 
 Cu.import("resource://gre/modules/Services.jsm");
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 Cu.import("resource:///modules/loop/MozLoopService.jsm");
 
 XPCOMUtils.defineLazyModuleGetter(this, "hookWindowCloseForPanelClose",
                                         "resource://gre/modules/MozSocialAPI.jsm");
+XPCOMUtils.defineLazyGetter(this, "appInfo", function() {
+  return Cc["@mozilla.org/xre/app-info;1"]
+           .getService(Ci.nsIXULAppInfo)
+           .QueryInterface(Ci.nsIXULRuntime);
+});
 XPCOMUtils.defineLazyServiceGetter(this, "clipboardHelper",
                                          "@mozilla.org/widget/clipboardhelper;1",
                                          "nsIClipboardHelper");
 this.EXPORTED_SYMBOLS = ["injectLoopAPI"];
 
 /**
  * Inject the loop API into the given window.  The caller must be sure the
  * window is a loop content window (eg, a panel, chatwindow, or similar).
  *
  * See the documentation on the individual functions for details of the API.
  *
  * @param {nsIDOMWindow} targetWindow The content window to attach the API.
  */
 function injectLoopAPI(targetWindow) {
   let ringer;
   let ringerStopper;
+  let appVersionInfo;
 
   let api = {
     /**
      * Sets and gets the "do not disturb" mode activation flag.
      */
     doNotDisturb: {
       enumerable: true,
       get: function() {
@@ -234,17 +240,41 @@ function injectLoopAPI(targetWindow) {
      * @param {String} str The string to copy
      */
     copyString: {
       enumerable: true,
       writable: true,
       value: function(str) {
         clipboardHelper.copyString(str);
       }
-    }
+    },
+
+    /**
+     * Returns the app version information for use during feedback.
+     *
+     * @return {Object} An object containing:
+     *   - channel: The update channel the application is on
+     *   - version: The application version
+     *   - OS: The operating system the application is running on
+     */
+    appVersionInfo: {
+      enumerable: true,
+      get: function() {
+        if (!appVersionInfo) {
+          let defaults = Services.prefs.getDefaultBranch(null);
+
+          appVersionInfo = Cu.cloneInto({
+            channel: defaults.getCharPref("app.update.channel"),
+            version: appInfo.version,
+            OS: appInfo.OS
+          }, targetWindow);
+        }
+        return appVersionInfo;
+      }
+    },
   };
 
   let contentObj = Cu.createObjectIn(targetWindow);
   Object.defineProperties(contentObj, api);
   Object.seal(contentObj);
   Cu.makeObjectPropsNormal(contentObj);
 
   targetWindow.navigator.wrappedJSObject.__defineGetter__("mozLoop", function() {

--- a/browser/components/loop/content/js/conversation.js
+++ b/browser/components/loop/content/js/conversation.js
@@ -246,21 +246,23 @@ loop.conversation = (function(OT, mozL10
      * Call has ended, display a feedback form.
      */
     feedback: function() {
       document.title = mozL10n.get("call_has_ended");
 
       var feebackAPIBaseUrl = navigator.mozLoop.getLoopCharPref(
         "feedback.baseUrl");
 
+      var appVersionInfo = navigator.mozLoop.appVersionInfo;
+
       var feedbackClient = new loop.FeedbackAPIClient(feebackAPIBaseUrl, {
         product: navigator.mozLoop.getLoopCharPref("feedback.product"),
-        platform: navigator.platform
-        // XXX add "channel" and "version" options as per bug 1048785; these
-        //     could be provided by the mozLoop API.
+        platform: appVersionInfo.OS,
+        channel: appVersionInfo.channel,
+        version: appVersionInfo.version
       });
 
       this.loadReactComponent(sharedViews.FeedbackView({
         feedbackApiClient: feedbackClient
       }));
     }
   });
 

--- a/browser/components/loop/content/js/conversation.jsx
+++ b/browser/components/loop/content/js/conversation.jsx
@@ -246,21 +246,23 @@ loop.conversation = (function(OT, mozL10
      * Call has ended, display a feedback form.
      */
     feedback: function() {
       document.title = mozL10n.get("call_has_ended");
 
       var feebackAPIBaseUrl = navigator.mozLoop.getLoopCharPref(
         "feedback.baseUrl");
 
+      var appVersionInfo = navigator.mozLoop.appVersionInfo;
+
       var feedbackClient = new loop.FeedbackAPIClient(feebackAPIBaseUrl, {
         product: navigator.mozLoop.getLoopCharPref("feedback.product"),
-        platform: navigator.platform
-        // XXX add "channel" and "version" options as per bug 1048785; these
-        //     could be provided by the mozLoop API.
+        platform: appVersionInfo.OS,
+        channel: appVersionInfo.channel,
+        version: appVersionInfo.version
       });
 
       this.loadReactComponent(sharedViews.FeedbackView({
         feedbackApiClient: feedbackClient
       }));
     }
   });
 

--- a/browser/components/loop/test/desktop-local/conversation_test.js
+++ b/browser/components/loop/test/desktop-local/conversation_test.js
@@ -33,17 +33,24 @@ describe("loop.conversation", function()
       },
       get locale() {
         return "en-US";
       },
       setLoopCharPref: sandbox.stub(),
       getLoopCharPref: sandbox.stub(),
       startAlerting: function() {},
       stopAlerting: function() {},
-      ensureRegistered: function() {}
+      ensureRegistered: function() {},
+      get appVersionInfo() {
+        return {
+          version: "42",
+          channel: "test",
+          platform: "test"
+        };
+      }
     };
 
     // XXX These stubs should be hoisted in a common file
     // Bug 1040968
     document.mozL10n.initialize(navigator.mozLoop);
   });
 
   afterEach(function() {

--- a/browser/components/loop/test/mochitest/browser.ini
+++ b/browser/components/loop/test/mochitest/browser.ini
@@ -1,7 +1,8 @@
 [DEFAULT]
 support-files =
     head.js
 
+[browser_mozLoop_appVersionInfo.js]
 [browser_mozLoop_charPref.js]
 [browser_mozLoop_doNotDisturb.js]
 skip-if = buildapp == 'mulet'

new file mode 100644
--- /dev/null
+++ b/browser/components/loop/test/mochitest/browser_mozLoop_appVersionInfo.js
@@ -0,0 +1,33 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * This is an integration test from navigator.mozLoop through to the end
+ * effects - rather than just testing MozLoopAPI alone.
+ */
+
+add_task(loadLoopPanel);
+
+add_task(function* test_mozLoop_appVersionInfo() {
+  Assert.ok(gMozLoopAPI, "mozLoop should exist");
+
+  let appVersionInfo = gMozLoopAPI.appVersionInfo;
+
+  Assert.ok(appVersionInfo, "should have appVersionInfo");
+
+  Assert.equal(appVersionInfo.channel,
+               Services.prefs.getCharPref("app.update.channel"),
+               "appVersionInfo.channel should match the application channel");
+
+  var appInfo = Cc["@mozilla.org/xre/app-info;1"]
+                  .getService(Ci.nsIXULAppInfo)
+                  .QueryInterface(Ci.nsIXULRuntime);
+
+  Assert.equal(appVersionInfo.version,
+               appInfo.version,
+               "appVersionInfo.version should match the application version");
+
+  Assert.equal(appVersionInfo.OS,
+               appInfo.OS,
+               "appVersionInfo.os should match the running os");
+});