Mac app only allows me to add websites from suggestions

Hi all. First of all, the Mac app is a great addition to an already great app! I have been having an issue though that’s keeping Opal from being completely useful to me on my Mac. I play kittens game (kittensgame.com), but Opal doesn’t let me add just the domain – it suggests me the full url of the web version of the game, and it doesn’t match if I access it (probably because the suggestion is suffixed with a hash, and when I access the game through my favorites it doesn’t have the hash). If I could add just the domain, I imagine I wouldn’t have the issue