Is this with an older Firefox version maybe? I've tried with a relatively recent one and couldn't reproduce, but I'll look at the logs and try to fix this now that the HN storm has passed :-)
It seems to work a bit better now but it looks like it isn't working as the page stops when it goes into a transition.
There's a writers maxim, "murder your darlings". what they mean is that a work often has some styling, phrases, exposition, even whole characters or subplots that the writer has worked hard on and become attached to, but that detract from the work as a whole. So they have to be removed. I think this may be a darling unfortunately.
Strange. I haven't changed a thing. Just to confirm, the problem yesterday was that the website would be stuck, not that you couldn't move down further by scrolling in an unnatural way, right?
As a data point (another aFF on Android) I could scroll down, but the experience is painful. I am interested in SDRs and have a bunch of HackFRs and dongles, but the page was very off-putting. I suspect most tinkerers that would be interested in this hardware would love an option to see all this on a static web page.