Many comments about this, so I'll address them here.
We talked extensively with the 18-20 year olds who make up our target demographic and this "scrollytelling" style is their strong preference over the "wall of text" that I and most of my generation prefer.
What your comments make clear is that we need to develop a parallel version that is more less plain text for people who are using a range of devices, for people who have the same reading preferences that I do, etc.
Right now we're entirely self-funded and doing this on spare time but it's clear to me that an alternative version with a very clean CSS layout is the way to go, possibly with a pdf option as well.
I don't want to let versions proliferate too extensively, simply because this is very much a living document. Technologies are changing so fast in this area that many of the examples will seem dated in a year and — while we've tried to be forward-thinknig about this — some of principles may even need revision.
Was hoping HN would pick this up. Scroll is completely broken on Firefox (iOS), flickering vscroll. Very common with journalistic expose-style articles.
For the love of everything, please stop scrolljacking. Layout, images, go nuts. CSS is powerful these days, use it.
I'm surprised at the firefox problems; I did almost all the development in firefox. I know it's not your job to fix any of this, but if you are so inclined I'd be grateful for an email me with screenshots or descriptions of where things break.