Won't create certain images

"The current Firefly generative AI model is trained on a dataset of Adobe Stock along with openly licensed work and public domain content where copyright has expired. As Firefly evolves, Adobe is exploring ways for creators to be able to train the machine learning model with their own assets so they can generate content that matches their unique style, branding, and design language without the influence of other creators’ content. Adobe will continue to listen to and work with the creative community to address future developments to the Firefly training models.

"As an Adobe customer, is my content automatically used to train Firefly?

"No, we don't train on any Creative Cloud subscribers’ personal content. For Adobe Stock contributors, the content is part of Firefly’s training dataset, in accordance with Stock Contributor license agreements.

"What is Adobe doing to ensure AI-generated images are created responsibly? 

As part of Adobe’s effort to design Firefly to be commercially safe, we are training our initial commercial Firefly model on Adobe Stock images, openly licensed content, and public domain content where copyright has expired"

https://helpx.adobe.com/firefly/faq.html#training-data

Jane