hydnj I'm very late here, but I maintain that fork, and I would not call it obsolete 🙂 the important JavaScript parts were rewritten in the fork, and the extension will be updated for beta 8, probably also adding CTRL/CMD+V support for uploading images.
I would also like to make clear that the comparison with flagrow/upload was meant to be just that, a comparison, and not a confrontation. It's just a different way of doing it ✌️