firefly can't read
Here is the prompt:
super hero who knits socks as his super power with white hair, 50 years old, no beard. Remove the beard. NO BEARD, no facial hair!
All I get is a santa figure with a white beard.
Even if I remove the white hair, I get a beard. As though all 50 year old men have beards. Even when I say NO BEARD!!!!!

You could teach Firefly to read.
Better yet, you could allow us to click on a photo and then request for alterations to that photo.
As it is, Firefly is lightyears behind Chat GPT for creating images. At leaste ChatGPT allows you to alter the current image. With Firefly, you have to change the prompt to try and get a new result and it may or may not use some of the things you like from the older version.
I did try to use the remove tool to select the beard and put in the prompt to "remove beard" but Firefly just replaced the beard with another beard. So apparently shaving is against firefly's rules.
