I just recently installed Fedora 23 on my machine, and still have my f20 install on my machine. When trying to 'fix' Nautilus so that backspace goes back, I noticed that there is no longer an accels file under ~/.config/nautilus/ so I tried adding my old one, but have had no luck.
I've tried to find an accels file somewhere else on the machine, but to no avail. Does anyone know if they've changed the way that you can alter nautilus behaviour in the recent Gnome update?
FYI: Gnome Nautilus 3.18.4
So here's the answer:
The accels file no longer works. It was implemented for GtkAction but since nautilus was ported to GAction, the old implementation no longer works.