use autocomplete="one-time-code"

see https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#attr-fe-autocomplete-one-time-code

mfa/forms.py

@@ -8,7 +8,7 @@ class MFABaseForm(forms.Form):
     def __init__(self, validate_code=None, **kwargs):
         self.validate_code = validate_code
         super().__init__(**kwargs)
-        self.fields['code'].widget.attrs.update({'autocomplete': 'off'})
+        self.fields['code'].widget.attrs.update({'autocomplete': 'one-time-code'})
 
     def clean(self):
         cleaned_data = super().clean()