When generating images in Firefly, I feel like my account should store a library of at least so many of my most recent generations, so that when i am in the middle of a project and my system crashes, or the power goes out, I can come back an pick up from where i left off instead of having to start over and quite possibly not being able to get back to where I was.
Topaz Labs' Bloom online generator stores your previous generations including original images, the prompts, and variations produced making it very easy to get back into a project or revisit results you may have looked over on a first viewing.