[newscombinatorY]

I'd add preventing text selection, right-clicking or pasting from the clipboard to the list. I hate when websites do that.

[stvltvs]

Especially egregious when preventing pasting into a password field. Do they want me to have a weak password so that I can manually type it in instead of pasting it from a password manager?

[michaelcampbell]

There's an old, but good, set of browser plugins called "don't fuck with paste" that helps a little, at least.

[antiframe]

Setting dom.event.clipboardevents.enabled in about:config to false will prevent sites from messing with cut and paste.

[LoganDark]

In Firefox

[LorenDB]

Brave actually added a force paste option recently for such cases.