diff --git a/browser/components/search/content/search.xml b/browser/components/search/content/search.xml
index 51057655ab37..52c2f45f294a 100644
--- a/browser/components/search/content/search.xml
+++ b/browser/components/search/content/search.xml
@@ -92,6 +92,8 @@
             <xul:menuitem class="open-engine-manager"
                           anonid="open-engine-manager"
                           label="&cmd_engineManager.label;"
+# The empty tooltiptext attribute is here to avoid bug 336231
+                          tooltiptext=""
                           oncommand="openManager(event);"/>
           </xul:menupopup>
         </xul:button>