Adobe Bridge CC version 2017 and 2018:
In "folders" (sidebar) view hidden system directories are visible in macOS High Sierra 10.13.x: "private", "Network", "usr", "sbin", "cores", "bin" - all in the macOS root directory. Normally these folders are not visible.
Not a big deal, more or less a cosmetic bug. I guess version 2017 is not updated anymore? Too bad, because of the new file info panel (e.g. no autofill anymore) in Bridge CC 2018, I am planning to stay on version 2017.
Just reporting it for the next bug fix update for Bridge (if there is one planned;)