Firefox  browser issue

<script type="text/javascript">
//<![CDATA[
     jQuery.noConflict();  
(function($) {  
// Init 
$(document).ready(function() {

// firefox bug fix for admin menu
        $('.cd-btn').on('click', function(event){
                event.preventDefault();
                $("#cms", window.parent.document).parent().parent().parent().parent().parent().css("top", "0").css("height", "100%");
        });
        //clode the lateral panel
        $('.cd-panel').on('click', function(event){
                if( $(event.target).is('.cd-panel') || $(event.target).is('.cd-panel-close') ) { 
                        $("#cms", window.parent.document).parent().parent().parent().parent().parent().css("top", "48px").css("height","calc(100vh - 48px)");
                        event.preventDefault();
                }
        });
});
})(jQuery); 
//]]>
</script>