Thanks for the feedback.

I agree that changing stored passwords is a procedure that has never been as smooth as I'd like. I'm hoping to spend some effort improving that this year. In the mean time, note that the save/update password feature is designed purely for saving sign-in requests so you'll have more luck if you keep a separate copy of the password temporarily and then save the login entry after the first sign in after you changed the password.

There are some web browser bugs that have made favicon saving unreliable in recent years. Hopefully that won't be the case forever though.