--- a/browser/components/search/content/search.xml
+++ b/browser/components/search/content/search.xml
@@ -392,17 +392,16 @@
           const kXULNS =
                "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
 
           var engines = this.engines;
           for (var i = engines.length - 1; i >= 0; --i) {
             var menuitem = document.createElementNS(kXULNS, "menuitem");
             var name = engines[i].name;
             menuitem.setAttribute("label", name);
-            menuitem.setAttribute("id", name);
             menuitem.setAttribute("class", "menuitem-iconic searchbar-engine-menuitem menuitem-with-favicon");
             // Since this menu is rebuilt by the observer method whenever a new
             // engine is selected, the "selected" attribute does not need to be
             // explicitly cleared anywhere.
             if (engines[i] == this.currentEngine)
               menuitem.setAttribute("selected", "true");
             var tooltip = this._stringBundle.getFormattedString("searchtip", [name]);
             menuitem.setAttribute("tooltiptext", tooltip);