@Oh.N8, I think there is an issue. I am experiencing it. Very blurry results from Gen Fill on the Firefly website and in Adobe Express, but not in Photoshop.
@Tarun Saini, It is not as bad today, but over the weekend, using gen fill in Express generated very blurry (motion-blur like) results for all results. Adding words to the prompt to try to get the background more in focus did not do anything. Gen Fill on the Firefly page was also generating images with the same issue.