jarring animation transition on firefox

[Samiam519]

when moving from one cover to another on firefox, the animation transition zooms in to the full screen

[vanderlee]

I just tried the latest 64b Firefox on Win10, and the demo's look normal.
How do the standard demo's at http://vanderlee.github.io/coverflow/demo.html look on your system?

[Samiam519]

The demo doesn't do that in firefox. My code has the same animateStep function that your library index.html uses. Is there any reason this bug would only exist in firefox?