Device is Motorola Moto G (3rd Gen) using Android 6.0.
I've recently switched browsers to Adblock Browser (
https://adblockbrowser.org/). I checked on Chrome and, you're right, the notices are still there.
Adblock Browser may be too obscure to warrant support, but it's based on Firefox/Mozilla so it would probably be good to know if it occurs on that browser. I don't have time right now, but later tonight I can download FF to my phone and check if no one has confirmed before then.