Comment by alias_neo
Also, system-wide adblocking either has to be done off-device (no good for cellular networks) or with an on-device VPN, which is no good if you actually want to use a VPN of your own.
Personally, I stopped rooting a few years ago and I don't see any ads with Firefox + uBlock Origin; I just don't use the type of apps that would show ads; not necessarily intentionally any more, just that the types of services I install apps for don't do it (making obvious exceptions for things like Amazon where the entire app is an Ad).
> with an on-device VPN, which is no good if you actually want to use a VPN of your own.
I co-develop a FOSS Android app that can run DoH, ODoH, firewall, and WireGuard: https://github.com/celzero/rethink-app