I do believe going barefoot is beneficial for both your body and mind, however I don’t think everybody should start going barefoot out in public, grocery stores, sidewalks, etc. Too many rocks from our rocky infrastructure. Next time you go on a hike, however, take your shoes off and feel the earth.
It sounds like you’ll have to set your Pihole as the DNS server in Firefox’s settings, and then maybe from there it’ll work itself out? Or maybe the Pihole documentation will be updated in the next few days with some instructions on enabling this. I’m unsure myself to be honest.