Firefly is no longer in beta as a full product. When it was in beta, it produced a label on the image saying it was a beta version. Any image with that label could not be used for commercial purposes. If you create an image now with Image 2 or Image 3, you won't get the beta label and thereby is commericially safe, https://helpx.adobe.com/firefly/faq.html#using-firefly "Can I use Firefly generated outputs commercially? For features without the beta label, you can use Firefly-generated outputs in your commercial projects. For features that are in beta, you can use the Firefly-generated outputs for your commercial projects unless explicitly stated otherwise in the product."
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