Well you process it like every other raw, I guess?
Or what is the specific problem with Fuji raws?
For Astrophotgraphy tips have a look at any post by @Jonas_Wagner or also the recent post by @harry_durgin:
Anyway, thanks for the raw. I did a little flashy version, and this picture is troublesome on the edge were there’s some noise or color smear going on. Any of the professional astrophotographers (@Jonas_Wagner ) know how to deal with that?
(Apart from lowering the ISO)