We need a specialist to deobfuscation of JavaScript code

Good day

You must deobfuscate JS code. The code generates a unique fingerprint of the browser based on SOMETHING that remains to be seen. The whole code is about 700 lines in the normalized form

Details:
shop.nordstrom.com/
When you first open the page, JS code is executed
After executing the code loads the actual content from the server, transmitting to him at three this HTTP header:
x-y8s6k3db-f – a id user
x-y8s6k3db-c – a id user
x-y8s6k3db-a – the most difficult is the fingerprint of the browser which is generated based on the number of type parameters of installed plugins, screen size, and God knows what. I need an accurate understanding on what basis is generated this hash

In the code there are several dictionaries for coding – decoding and add a sequence of code until you fully understand how it works

Recording video to make it clear what I mean:
d.pr/v/dfT06E