Security for your Firebase app
Firebase security depends almost entirely on the rules you write. With rules in test mode or too open, your database is within anyone's reach. Review it before opening your app.
Typical risks in Firebase
Rules in test mode
Test mode allows read and write for everyone. Many people launch without changing it, leaving the database wide open.
Mistaking the public key for security
The Firebase config is public by design; what protects your data are the rules, not hiding that key. Assuming otherwise leads to exposed data.
Other keys in the frontend
Alongside the Firebase config, keys that are actually secret often sneak in (payments, email, AI). Those must never be in browser JavaScript.
Related checks
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