Image viewer (similar to Windows 10 Photos)?

Question

Images

Good day everyone.
Briefly about the situation: At the moment, the regular Windows 10 Photos application is used to view images. In which there is one significant drawback for me - if you open more than 50 instances of this application (a new window is launched when each new image is opened), the application exits ( crashes, crashes) without any notification, drags away previously opened images.
In the standard application for viewing images in previous versions of windows - " Photo Viewer " such a problem was not observed, however, it has a white background, which "hurts my eyes" , and there is also no way to hide the controls.
Actually, we need your recommendations for an image viewer application that:

1. Opens each new image in a new window (more than 50).
   
2. It is possible to enable a dark background (interface).
   
3. Ability to quickly hide controls (hot keys, double click, context menu, etc.)
   

Actually, some analogue of "Photos" windows 10 is required, but with the ability to open more than 50 images at a time.
Thanks for your time and replies.

Answer 1

nomacs.org