You have been subscribed to a public bug:
On Kubuntu 17.10 Alpha 1, the GTK file chooser shows several unwanted
entries from /sys, /dev, etc. For me, this occurs in the GTK3 file
chooser opened from Firefox, GNOME Disks, etc. At the time of writing, I
haven't tested whether it occurs in the GTK2
Public bug reported:
On Kubuntu 17.10 Alpha 1, the GTK file chooser shows several unwanted
entries from /sys, /dev, etc. For me, this occurs in the GTK3 file
chooser opened from Firefox, GNOME Disks, etc. At the time of writing, I
haven't tested whether it occurs in the GTK2 chooser as well. I
