I have Ubuntu 22.04. I'm trying to find a program like Irfanview on Windows that can open the thumbnails in one window, and the image slideshow in a separate window. 

I tried installing Irfanview on Ubuntu using wine, but it can't see network drives, even if I mount them in the /mnt folder and every other program can see the files in there. I'm not sure why this is. Also, unlike in Windows, there doesn't appear to be an "open thumbnails with Irfanview" context menu option if I right-click on a folder.

Being able to open the slideshow in a separate window is extremely important for what I need it for. I tried Gwenview, xnviewmp, and gThumb, but none of them let me open in a separate window.