Most people will only trust the Data safety / Data Privacy section on the Play / App store (as they should):

- Firefox on Android: This app may share these data types with third parties: Location, Personal info and 3 others [0]

- Firefox on iOS: The following data may be collected and linked to your identity: Contact Info.

Data Not Linked to You. The following data may be collected but it is not linked to your identity: Location, Identifiers, Usage Data, Diagnostics [1]

- Brave on Android: No data shared with third parties, No data collected [2]

- Brave on iOS: No data shared with third parties, No data collected [3]

Data Not Linked to You. The following data may be collected but it is not linked to your identity: Identifiers, Usage Data [4]

It's evident, Brave collect way less data than Firefox on those platforms.

Maybe the problem of Mozilla is they feel entitled to the trust they gained when they were the open source browser against IE. But that trust erodes over time.

- [0] https://play.google.com/store/apps/details?id=org.mozilla.fi...

- [1] https://apps.apple.com/us/app/firefox-private-safe-browser/

- [2] https://play.google.com/store/apps/details?id=com.brave.brow...

- [3] https://apps.apple.com/us/app/brave-browser-search-engine/