I have the same problem height on tab and it does not work in firefox.
solution given funtions.php in another post solves the problem of tab visualization but not size tab

function ava_custom_script_fix(){
?>
<script>
(function($){
	function a() {
		$('.av-tab-section-container').bind('click', '.av-section-tab-title', function() {
			var active  = $(this).find('.av-active-tab-title'),
				number  = active.data('av-tab-section-title'),
				content = $(this).find('.av-layout-tab[data-av-tab-section-content='+ number +']').children('.av-layout-tab-inner'),
				oheight = content.outerHeight(true) + active.outerHeight(true) + 100;

				$(this).find('.av-tab-section-outer-container').css('max-height', oheight);
		});

		$('.av-section-tab-title:eq(0)').trigger('click');
	}

    a();
})(jQuery);
</script>
<?php
}
add_action('wp_footer', 'ava_custom_script_fix');

T_T