Website and autofill

@F_9083x:

Autofilling did not work I wanted it to work ( cannot recall exactly)
Just curious how 1password works ( in this case) and how it protects me from the internet.

In these cases, 1Password protects you by not offering you to fill your credentials on the website. If the website changes and it's not the one that you have stored inside 1Password in your login item, 1Password will not prompt you for your existing login, and it won't allow you to fill your username and password automatically (which sounds exactly like what happened in this case).

While doing this a question popped up: imagine it was a malicious website…could this login website do any harm to the existing passwords/data in my vault? When initially trying to autofill my credentials to this website, I unlocked the vault with my fingerprint several times.

Simply ulocking your vault won't be a problem. What matters is that you don't manually enter your credentials on that website if it's malicious (for example, by copy-pasting them from the 1Password app manually). If you do ever end up pasting your credentials into a malicious website, you should change that password on the real website for good measure.