FWIW I'm a developer, and I think password managers are awful to code against. They don't document their expectations (to the best of my knowledge), it's hard t

FWIW I'm a developer, and I think password managers are awful to code against. They don't document their expectations (to the best of my knowledge), it's hard to test because you need multiple password managers installed, plus the browser's built-in ones. I mean, even the link you shared feels more like alchemy than engineering (through no fault of the author, I might add): "do it kinda sorta like this and then hopefully it'll work most of the time!" And it's hard to figure out why it doesn't work when it doesn't. The feedback cycle is nonexistent.