Почему Swiper slider тормозит в firefox при effect: 'coverflow'?

var swiper = new Swiper ('.swiper-container', {
        loop: true,
        direction: 'vertical',
        
        paginationClickable: true,
        spaceBetween: 10,
        centeredSlides: true,
        speed: 600,
        
        effect: 'coverflow',
        grabCursor: true,
        slidesPerView: 2,
        coverflow: {
            rotate: 70,
            stretch: 0,
            depth: 100,
            modifier: 1
        }
  });