Since I have been having this very same issue and it seems all "alternatives" stopped working as the browsers have been getting recent updates, I came across a "dirty" solution that baffled me completely.
If we go on each field we want to disable the autocomplete feature and set its autocomplete attribute to an invalid value (only "off" and "on" are valid), the browser will stop trying to autofill those fields because of that.
Surprised? So was I!
Example:
<input type="text" autocomplete="stopdoingthat" />
And apparently it works. Stupid, I know, but it's a "dirty" one that actually works for now.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…