--- a/toolkit/locales/en-US/chrome/mozapps/update/updates.properties
+++ b/toolkit/locales/en-US/chrome/mozapps/update/updates.properties
@@ -17,16 +17,17 @@ updateName=%S %S
 # %2$S is the update version - provided by the update xml. Ex: version 10.0.5
 # %3$S is the build identifier - provided by the update xml. Ex: 20081022033543
 updateNightlyName=%1$S %2$S %3$S nightly
 intro_major=Do you want to upgrade to %1$S %2$S now?
 intro_minor=A security and stability update for %1$S is available:
 
 updateType_major=New Version
 updateType_minor=Security Update
+updateType_nightly=Regular Update
 
 # LOCALIZATION NOTE: When present %S is brandShortName
 verificationError=%S could not confirm the integrity of the update package.
 resumePausedAfterCloseTitle=Software Update
 resumePausedAfterCloseMsg=You have paused downloading this update. Do you want to download the update in the background while you continue to use %S?
 updaterIOErrorTitle=Software Update Failed
 updaterIOErrorMsg=The update could not be installed. Please make sure there are no other copies of %S running on your computer, and then restart %S to try again.
 okButton=OK

--- a/toolkit/mozapps/update/content/history.js
+++ b/toolkit/mozapps/update/content/history.js
@@ -1,13 +1,14 @@
 /* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+Components.utils.import("resource://gre/modules/AppConstants.jsm");
 const NS_XUL  = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
 
 var gUpdateHistory = {
   _view: null,
 
   /**
    * Initialize the User Interface
    */
@@ -33,16 +34,18 @@ var gUpdateHistory = {
         // valid statusText for the UI (bug 485493).
         if (!update.statusText)
           continue;
 
         var element = document.createElementNS(NS_XUL, "update");
         this._view.appendChild(element);
         element.name = bundle.getFormattedString("updateFullName",
           [update.name, update.buildID]);
+        if (AppConstants.NIGHTLY_BUILD)
+          update.type = "nightly";
         element.type = bundle.getString("updateType_" + update.type);
         element.installDate = this._formatDate(update.installDate);
         if (update.detailsURL)
           element.detailsURL = update.detailsURL;
         else
           element.hideDetailsURL = true;
         element.status = update.statusText;
       }