TL;DR: When using 3rd-party web browsers (e.g. Firefox), how much does the OS (Android) know about the user's activities?
Most information on the internet about privacy-focused web browsers focuses on tracking protection. Similarly, narrowing down the search queries to Android mostly gives results about Android permissions. But there is one glaring omission which I never see addressed: what about the OS itself? So, my question:
- How much does Android itself know about what is going on in the browser app? I.e. which sites the user visits, what the user sees, clicks on...?
1.1 Does it make any difference when using the browser's private mode or not?
1.2 Does it make a difference whether the device is running vanilla Android or one of the myriad vendors' customizations?)
In case the question is too broad, please consider specifically: Firefox / Android 12 / One UI 4.1 (Samsung).