diff --git a/browser/app/profile/firefox.js b/browser/app/profile/firefox.js
index 1e835c12cee1..914321bd9074 100644
--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -102,7 +102,7 @@ pref("app.update.mode", 1);
 pref("app.update.silent", false);
 
 // Update service URL:
-pref("app.update.url", "https://aus2.mozilla.org/update/2/%PRODUCT%/%VERSION%/%BUILD_ID%/%BUILD_TARGET%/%LOCALE%/%CHANNEL%/%OS_VERSION%/update.xml");
+pref("app.update.url", "https://aus2.mozilla.org/update/3/%PRODUCT%/%VERSION%/%BUILD_ID%/%BUILD_TARGET%/%LOCALE%/%CHANNEL%/%OS_VERSION%/%DISTRIBUTION%/%DISTRIBUTION_VERSION%/update.xml");
 // app.update.url.manual is in branding section
 // app.update.url.details is in branding section
 
diff --git a/toolkit/mozapps/update/src/nsUpdateService.js.in b/toolkit/mozapps/update/src/nsUpdateService.js.in
index 2532252578fa..1107999b5adb 100644
--- a/toolkit/mozapps/update/src/nsUpdateService.js.in
+++ b/toolkit/mozapps/update/src/nsUpdateService.js.in
@@ -58,6 +58,8 @@ const PREF_GENERAL_USERAGENT_LOCALE       = "general.useragent.locale";
 const PREF_APP_UPDATE_INCOMPATIBLE_MODE   = "app.update.incompatible.mode";
 const PREF_UPDATE_NEVER_BRANCH            = "app.update.never.";
 const PREF_PARTNER_BRANCH                 = "app.partner.";
+const PREF_APP_DISTRIBUTION               = "distribution.id";
+const PREF_APP_DISTRIBUTION_VERSION       = "distribution.version";
 
 const URI_UPDATE_PROMPT_DIALOG  = "chrome://mozapps/content/update/updates.xul";
 const URI_UPDATE_HISTORY_DIALOG = "chrome://mozapps/content/update/history.xul";
@@ -539,6 +541,22 @@ function getUpdateChannel() {
   return channel;
 }
 
+/* Get the distribution pref values, from defaults only */
+function getDistributionPrefValue(aPrefName) {
+  var prefValue = "default";
+
+  var defaults =
+      gPref.QueryInterface(Components.interfaces.nsIPrefService).
+      getDefaultBranch(null);
+  try {
+    prefValue = defaults.getCharPref(aPrefName);
+  } catch (e) {
+    // use default when pref not found
+  }
+
+  return prefValue;
+}
+
 /**
  * An enumeration of items in a JS array.
  * @constructor
@@ -1940,6 +1958,10 @@ Checker.prototype = {
     url = url.replace(/%LOCALE%/g, getLocale());
     url = url.replace(/%CHANNEL%/g, getUpdateChannel());
     url = url.replace(/%PLATFORM_VERSION%/g, gApp.platformVersion);
+    url = url.replace(/%DISTRIBUTION%/g,
+                      getDistributionPrefValue(PREF_APP_DISTRIBUTION));
+    url = url.replace(/%DISTRIBUTION_VERSION%/g,
+                      getDistributionPrefValue(PREF_APP_DISTRIBUTION_VERSION));
     url = url.replace(/\+/g, "%2B");
 
     if (force)