Bug 336231: work around bug 374288 by giving the "Manage search engines" menu item an empty tooltip, patch by Vlado Valastiak <valastiak@mozilla.sk>, r=me, a=schrep

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>