You just need to enter a website URL or select an APK that uses Firestore, and it will analyze it and generate a report with its findings. It may not be fully accurate all the time, but it usually is. The tool was made with benevolence in mind and should not be used for malicious purposes. I'm releasing it under the MIT license.

I’m releasing it now because it's something cool, and it was just sitting in cold storage without any use.