--- a/mobile/chrome/content/browser.xul
+++ b/mobile/chrome/content/browser.xul
@@ -226,17 +226,17 @@
                     <toolbarbutton id="tool-go" class="urlbar-cap-button" command="cmd_go"/>
                   </hbox>
                 </hbox>
                 <toolbarbutton id="tool-app-close" class="urlbar-button button-image" command="cmd_close"/>
               </toolbar>
             </box>
           </box>
 
-          <notificationbox id="notifications"/>
+          <notificationbox id="notifications" class="window-width"/>
 
           <!-- Content viewport -->
           <vbox class="window-width window-height">
             <stack id="tile-stack" class="window-width" flex="1">
               <scrollbox id="content-scrollbox" style="overflow: hidden;" class="window-width" flex="1">
                 <!-- Content viewport -->
                 <html:div id="tile-container" style="overflow: hidden;"/>
               </scrollbox>