Have proton pass provide a preview of what will be filled in each field when hovering over an item.

This would allow the user to quickly confirm that the selection is the correct one before selecting it. It is useful when the user may have more than one item which may be selectable. As an example, if filling out a form which requires identity info, the user may have a personal identity and a work identity.

This behavior is present in Google Password Manager and is very convenient.