Remove "autofill this form" suggestion

I have never and will never use options like this but with one particular website I visit several times a day, it constantly pops up. It used to try to take the hint, with an offer to take me into the settings to shut the option off, but doing that never worked and now, it just constantly shows up whenever I go anywhere where there's a form that has to be filled out. What can I do to get rid of this once and for all?