You are the admin. Paste your Firebase Realtime Database URL below. Once saved, every device that opens this GitHub link will sync automatically — no setup needed on their end.
console.firebase.google.com → New projectRealtime Database → Create database → Test modeRules tab → paste: {"rules":{".read":true,".write":true}} → Publishhttps://your-app-rtdb.firebaseio.com)After clicking Save, download the updated file and push it to your GitHub repo. Everyone who opens your GitHub Pages link will then sync automatically — they will never see this screen.
Fill in the details — syncs to all devices instantly.