code: function addonsManager_clearSearchField() {
      var textbox = this.getElement({type: "search_textbox"});
      var cmdKey = utils.getEntity(this.dtds, "selectAllCmd.key");
  
      this._controller.keypress(textbox, cmdKey, {accelKey: true});
      this._controller.keypress(textbox, 'VK_DELETE', {});
    }
docs: ///////////////////////////// Search section ///////////////////////////// 
  Clear the search field