The Firebase Data Processing and Security Terms [1] (section 5.2.1) limit Google's usage of any data they obtain through Firebase and would seem to prevent tha

The Firebase Data Processing and Security Terms [1] (section 5.2.1) limit Google's usage of any data they obtain through Firebase and would seem to prevent that sort of tracking. [1] https://firebase.google.com/terms/data-processing-terms#5.processing-of-data https://firebase.google.com/terms/data-processing-terms#5.pr...