--- a/browser/base/content/aboutDialog.xul
+++ b/browser/base/content/aboutDialog.xul
@@ -1,9 +1,9 @@
-<?xml version="1.0"?> <!-- -*- Mode: HTML -*- --> 
+<?xml version="1.0"?> <!-- -*- Mode: HTML -*- -->
 
 # 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/.
 
 <?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
 <?xml-stylesheet href="chrome://browser/content/aboutDialog.css" type="text/css"?>
 <?xml-stylesheet href="chrome://branding/content/aboutDialog.css" type="text/css"?>
@@ -99,17 +99,17 @@
               </hbox>
               <hbox id="manualUpdate" align="center">
                 <label>&update.manual.start;</label><label id="manualLink" class="text-link"/><label>&update.manual.end;</label>
               </hbox>
               <hbox id="unsupportedSystem" align="center">
                 <label>&update.unsupported.start;</label><label id="unsupportedLink" class="text-link">&update.unsupported.linkText;</label><label>&update.unsupported.end;</label>
               </hbox>
               <hbox id="restarting" align="center">
-                <label>&update.restarting;</label>
+                <image class="update-throbber"/><label>&update.restarting;</label>
               </hbox>
             </deck>
 #endif
           </vbox>
 
 #ifdef MOZ_UPDATER
           <description class="text-blurb" id="currentChannelText">
             &channel.description.start;<label id="currentChannel"/>&channel.description.end;
@@ -139,17 +139,17 @@
       <hbox pack="center">
         <label class="text-link bottom-link" useoriginprincipal="true" href="about:license">&bottomLinks.license;</label>
         <label class="text-link bottom-link" useoriginprincipal="true" href="about:rights">&bottomLinks.rights;</label>
         <label class="text-link bottom-link" href="https://www.mozilla.org/privacy/">&bottomLinks.privacy;</label>
       </hbox>
       <description id="trademark">&trademarkInfo.part1;</description>
     </vbox>
   </vbox>
-  
+
   <keyset>
     <key keycode="VK_ESCAPE" oncommand="window.close();"/>
   </keyset>
 
 #ifdef XP_MACOSX
 #include browserMountPoints.inc
 #endif
 </window>

--- a/browser/components/preferences/in-content/advanced.xul
+++ b/browser/components/preferences/in-content/advanced.xul
@@ -150,17 +150,17 @@
       <hbox id="unsupportedSystem" align="center">
         <label>&update.unsupported.start;</label><label id="unsupportedLink" class="text-link">&update.unsupported.linkText;</label><label>&update.unsupported.end;</label>
         <spacer flex="1"/>
         <button label="&update.checkForUpdatesButton.label;"
                 accesskey="&update.checkForUpdatesButton.accesskey;"
                 disabled="true"/>
       </hbox>
       <hbox id="restarting" align="center">
-        <label>&update.restarting;</label>
+        <image class="update-throbber"/><label>&update.restarting;</label>
         <spacer flex="1"/>
         <button label="&update.updateButton.label3;"
                 accesskey="&update.updateButton.accesskey;"
                 disabled="true"/>
       </hbox>
     </deck>
   </vbox>
 #endif