We are going to see sooooo many scams out there. No wonder Google is locking down third party Android apps outside of their control, getting a user to install "device verification.apk" will become super trivial after people have clicked through these popups a couple times.
-- sent from Chrome on Android
That entire QR barcode thing is so that you can browse the web on your laptop/desktop, and _still_ rely on smart phone's attestation, no mobile browser needed.