Set Custom Username/Password Field Name

Allowing to copy a field name is great… but being able to say “use this as username/password field” would be a better user experience.
And of course, if we use that functionality, auto-fill the field immediately.

Copy Custom Field Name

If a site doesn’t use common names for the username/password fields, we have to define custom fields… but apparently we still can’t use a variable in the custom field value (see related topic below).
But anyway, it’s ugly because we have the default username/password field + our custom fields, while the default fields are actually useless.
Wouldn’t it be better to allow to define a custom field name for the username/password field?

Related topic: