Thank you for letting me know. I think it is now fixed. Please try again now.
Scrolling to the next section works well but scrolling to a previous one feels too sticky now (requires too long of a swipe to the right for me at least).
What a great project, I'm really enjoying it. Well done!
Ok will test some more.
The problem is kinda Firefox actually. Swurl is using this newish css snap feature, but Firefox's implementation is a bit buggy. Sorry...