Newbi init and stops working after a while

I can confirm https://www.nordicsemi.com/eng/Products/Bluetooth-low-energy/nRF-Connect-for-desktop :

• on windows, the nRF connect is an electron app, asar package
  
• on ubuntu/linux, the nRF connect is an electron app, luckly not asar: pack out and cherry pick js
  
• on OS X, I have not enough money for an apple :)
  
  

It seems the techy aspects of bluetooth with browser is Wait for Chrome but does that give the techy "serialized softdevice commands" with two outcomes:

1. puck.js can only be updated by an android/iPhone app that is not within Espruino control (no windows possible)
   
2. something may work in windows os: but don't hold yr breath timeframes and possibilities are unknown
   
   

Roll on Windows Desktop on Canonical Ubuntu: Xenix returns, with possible internal MS project name "Phoenix": but this is outside of the problem at hand.

Edit: package.json

"author": "Nordic Semiconductor ASA",
  "license": "Proprietary",

Edit:
A lot of code on Nordics github and unknown if "what is needed" is there.

Edit:
DFU seems to be https://github.com/NordicSemiconductor/secure-dfu-web-bluetooth
with a keyword Esruino in the package.json

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