- Add
autocomplete="off"
onto<form>
element; - Add hidden
<input>
withautocomplete="false"
as a first children element of the form.
<form autocomplete="off" method="post" action="">
<input autocomplete="false" name="hidden" type="text" style="display:none;">
...
This formation is going to prevent Chrome and Firefox to offer autofill and autocomplete for all input fields inside the form. After everything I've done, this way is quite helpful for me.