Yeah, I a think other browsers want to be able to test whether there is a saved password or not, and get the corresponding username, which is quite a big permis

Yeah, I a think other browsers want to be able to test whether there is a saved password or not, and get the corresponding username, which is quite a big permission to give away. For actually filling in the password they could maybe offer a pop up where the user must authorise the app using biometrics or some other OS-level action. That’s already the experience with safari.