[drewzero1]

That was my first thought as well, but I couldn't remember the name for that boundary. I hope there is a well-designed per-site control/setting/user consent system to keep tech support scam sites (or worse!) from adding one more tool to their arsenal.

[fiddlerwoaroof]

I’ve seen it called “The Line of Death”

https://textslashplain.com/2017/01/14/the-line-of-death/