I just don't have a button for Firefly to work. I've been trying to solve the problem for a couple of hours now, but nothing is working. I reinstalled photoshop several times, logged in and out of my account, checked my internet connection, etc. Perhaps someone has encountered something similar?
Firefly is not a part of Photoshop - yet. The only way to use FireFly is to go here https://firefly.adobe.com/, login with your Adobe ID, then click on one of the options, like Text to Image.
You CAN use Generative Fill with the BETA version of Photoshop. Generative Fill - and the other new AI features - are ONLY a part of the beta version, so you'll need to install it by going to Creative Cloud, then clicking on Beta apps, and selecting PhotoShop.
I'm not with Adobe, just a regular Joe answering your question.