A valid "fix" would be if these browsers would create an html code to disable their autofill on any page it's specified; so they could make support for a prepriatary tag like:
<meta name="autofill" content="disabled" />
Then we could just embed that anywhere we'd want it disabled, like every page of the CP... But that's up to them what prepriatry crap they want to shove in their product...