How do I activate Adobe Firefly in Photoshop?

To activate Adobe Firefly in Photoshop, assuming it's a new AI style transfer feature or similar update Adobe has released, begin by updating your Adobe Photoshop application to the latest version through the Adobe Creative Cloud. Once updated, you can access Firefly by navigating to the appropriate menu where such features reside—this could be under 'Filter', a dedicated 'Neural Filters' section, or a specific 'AI' or 'Firefly' labeled section within the application's toolbar. From there, follow the prompt to enable Firefly and apply it to your current project. Typically, you might have to sign in with your Adobe account to use the new features if they require cloud-based processing or access to additional resources. If this is a hypothetical feature or not yet released at the time of the knowledge cutoff, one would have to wait for official directions from Adobe on how to enable and use Firefly in Photoshop.