diff -u b/misc/ajax_facets.js b/misc/ajax_facets.js
--- b/misc/ajax_facets.js
+++ b/misc/ajax_facets.js
@@ -497,10 +497,9 @@
    * Returns query string with selected facets.
    */
   Drupal.ajax_facets.getFacetsQuery = function() {
-    var filters = Drupal.ajax_facets.queryState.f.slice(0),
-      query = {
-        'f': filters
-      };
+    var query = {
+      'f': Drupal.ajax_facets.queryState.f
+    };
 
     if (Drupal.ajax_facets.queryState.query) {
       query.query = Drupal.ajax_facets.queryState.query;
@@ -515,10 +514,6 @@
       query.pages = Drupal.ajax_facets.queryState.pages;
     }
 
-    if (Drupal.ajax_facets.queryState['display-hidden']) {
-      query.display = Drupal.ajax_facets.queryState['display-hidden'];
-    }
-
     return decodeURIComponent($.param(query));
   };
 
@@ -547,9 +542,11 @@
    * So before pushing new state to history we should unbind from this event and after bin again.
    */
   Drupal.ajax_facets.pushState = function (state, title, stateUrl) {
-    $(window).unbind('statechange', Drupal.ajax_facets.reactOnStateChange);
+    var $window = $(window);
+
+    $window.unbind('statechange', Drupal.ajax_facets.reactOnStateChange);
     History.pushState(state, title, stateUrl);
-    $(window).bind('statechange', Drupal.ajax_facets.reactOnStateChange);
+    $window.bind('statechange', Drupal.ajax_facets.reactOnStateChange);
   };
 
   /**
@@ -563,2 +560,9 @@
   };
+
+  /**
+   * Initial bind to statechange event.
+   */
+  History.Adapter.bind(window, 'statechange', function () {
+    Drupal.ajax_facets.reactOnStateChange();
+  });
 })(jQuery);