diff --git a/static/js/message_list_view.js b/static/js/message_list_view.js
index ad08c7d059..82e865743c 100644
--- a/static/js/message_list_view.js
+++ b/static/js/message_list_view.js
@@ -381,21 +381,6 @@ MessageListView.prototype = {
             table.append(rendered_elems);
 
             list.update_trailing_bookend();
-
-            // XXX: This is absolutely awful.  There is a firefox bug
-            // where when table rows as DOM elements are appended (as
-            // opposed to as a string) a border is sometimes added to the
-            // row.  This border goes away if we add a dummy row to the
-            // top of the table (it doesn't go away on any reflow,
-            // though, as resizing the window doesn't make them go away).
-            // So, we add an empty row and then garbage collect them
-            // later when the user is idle.
-            var dummy = $("<div></div>");
-            table.find('.ztable_layout_row').after(dummy);
-            $(document).idle({'idle': 1000*10,
-                              'onIdle': function () {
-                                  dummy.remove();
-                              }});
         }
 
         _.each(rendered_elems, function (elem) {