Limit a specific type of user in Firestore to read

Question

Has any way to limit users to read based on time, using Firestore Rules?

E.g: Limit a malicious user authenticated as an anonymous user to read a document several times per millisecond. This can cause elevate pricing for this multiples requests

Answer 1

There is no way to limit the rate of document reads using security rules. If you think someone is abusing the resources in your project, contact Firebase support and explain what you're observing.