Unlikely. Based on the google trends [1], Figma sees around 10x more traffic than Firefly, but more importantly it experiences severe weekend drop-offs, meaning people are using it for work. Firefly on the other hand has a constant amount of attention, in line with people playing around with it but not committing to it for serious projects.
Anecdotally I work in UI/UX space as a contractor and I've been given every design in Figma, I hadn't even heard of Firefly until this comment.
[1] https://trends.google.com/trends/explore?date=today%203-m&ge...