We released a small but significant (at least to some of our customers) improvement today.

Previously, when embedding Deftform on pages other than your homepage (root domain), the response would not use the complete URL as referrer. Now, we show the full URL of any page where your form is embedded, making it easier to track form locations and improve your site analytics.

Please note that it's not possible to make this work for existing submissions, only for new ones.