I have the following code
background-image: url(#minha0imagem#);
background-size: contain;
background-repeat: no-repeat;
Chrome stays the way I want, in the center and full screen. In firefox no.
I've tried -moz, -webkit, I've updated my firefox.
It seems that the way firefox works with image resizing is different from chrome and even using pure CSS3 and HTML5 I can not replicate the effects.