So the Exodus Privacy site just checks for certain tracking digital signatures and libraries, that's it. It's not reliable at all. Firefox for Android itself has a button called "Libraries that we use" in the Settings that shows them, which is probably more reliable. For example, Facebook has "0 trackers" because the app doesn't use any external SDKs to track you, it is all in the app itself. It also shows libraries that aren't even trackers in the first place such as Mapbox.