@capitan Mine uses /compose?mode=minimal because that mode minimal part means it only shows the compose form and none of the rest of the Friendica UI. Otherwise, in the small popup window it would show the mobile UI for the responsive themes, or a UI that doesn't fit for the older non-responsive ones.

Unfortunately once you submit your post there's no way to make it close the pop-up and load the full site in a new window, it will just refresh in that popup with the full site. 🙁. Of course that's not an issue if you set my script to open in a tab instead of a popup.