You NEED to use https when visiting any .dev domain. Google has put it on the HSTS preload list.
It took me a while to find out why my browser kept redirecting me to https when I wanted to use http (local development). Curl worked fine…
Just for the record, anybody can add their own domain to HSTS via the submission site[1].
[1] https://hstspreload.org/
IMHO http has no use in the modern world.