some plugins (like the zfs one) have some assets missing, also the Navigator works really slow when moving files (it should be instantaneously) and leaves the empty folders in the old directory
I believe there's something wrong with your setup then.
I was thinking about using FileBrowser in a docker container
Filebrowser is a SINGLE binary, no need to run it in a container and deal with all the mapping stuff when it would be an essential part of the NAS.