[vladde]

when you click away to another tab, the title and favicon of the page changes to something weird, but really legit looking.

a couple of my favorites: "rust programming socks - Google", "Amazon.com: waifu pillow", "Rick Astley - Never Gonna Give You Up", "censorship on hacker news - Google"

[foolserrandboy]

It actually gives you warning in an overlay first that the favicon would change if you open a new tab. I did and I got "zuckerberg nudes"

[Izkata]

Went to try it out myself and the very first one I got was the HN icon and "The internet used to be fun".