I sometimes wonder whether the ubiquity of sites that use scrolling for animation and parallax effects will come to define a period in web design in a way that “Flash/DHTML” sites now do. Having said that, for the time being let’s just enjoy this visual feast – of which the Firefox OS site is a great example.

There are a few things that they get right where other scrolling sites have fallen down:

• The timing is good when things appear on screen – I’ve seen a few other sites where the text appears for such a small amount of scrolling that you have to scroll back to read it.
• I can use my scroll wheel on my mouse without the screen juddering.
• There is an obvious alternative navigation to just scrolling.
• It adapts to screen size
• 2mb is big, but not as big as many similar sites. Strangely the bubble png at the bottom takes up 10% of this and could just be a jpg

I also love the clever (although simple) way the fox wraps itself around the phone.