When using coverflow in Firefox 58.0 the transition is not smooth.

[marten83]

This is a (multiple allowed):

• [x] bug

• [ ] enhancement

• [ ] feature-discussion (RFC)

• Swiper Version: 4.1.0

• Platform/Target and Browser Versions: macOS - Firefox 58.0

What you did

var swiper = new Swiper('.swiper-container', {
      effect: 'coverflow',
      grabCursor: true,
      centeredSlides: true,
      slidesPerView: 'auto',
      coverflowEffect: {
        rotate: 50,
        stretch: 0,
        depth: 100,
        modifier: 1,
        slideShadows : true,
      },
      pagination: {
        el: '.swiper-pagination',
      },
    });

Expected Behavior

When using "coverflow" in other browser than Firefox for example Chrome the transition between slides is smooth and work as expected.

Actual Behavior

In Firefox (58.0) the transition is choppy. The same behavior occurs on your own "topslider" at: http://idangero.us/swiper/. The first slides is fine but after some transition the problem starts. This was working fine before updating Firefox to 58.0

[nolimits4web]

Issue with FF itself, something got broken in it. If you disable 3d-related CSS rules, it works normal, but without 3d effect