Adobe Firefly bias towards women

Just to add what others have said. Give detail to the way you want your character to appear (colour, hair - length/colour, eyes, etc). Generally, if you ask for a man or woman, it will create that. Firefly does inject diversity so if you simply state ask for a group of people, you're likley to get a mix of genders and cultural diversity.

It also cannot utilize prompts like Arstation, Unreal engine, etc.

This is what I came up with in a couple of minutes using prompts and the settings on the side panel
https://firefly.adobe.com/public/t2i?id=urn%3Aaaid%3Asc%3AUS%3Aa42ef248-025e-4d19-b8bc-0387caf3550f&ff_channel=shared_link&ff_source=Text2Image

Firefly is not trained on historical, religous, or public figures. You can describe the person you are trying to depict but you can't ask it to render someone specifically by name.

It gets worse