I tried the example on the linked PoC page...it didn't work. I literally got what it showed visually, no newlines or other unexpected stuff: sudo apt update<p>Watched console while doing it, and didn't see anything at all (was expecting some js error or something).<p>For those that are wondering...Firefox 95.0.2 on Windows 10
I hadn't really thought about the possibility of malicious contents being written to a clipboard after the fact. There goes another item on the huge pile of things that might seem ok on the surface, but can completely F you.