2020 - For Nautilus 3.30.5 (on Debian Buster and Gnome 3.30.2)
Based on nautilus-backspace, you need to install nautilus-python and then place a python script in ~/.local/share/nautilus-python/extensions/
.
Install python-nautilus
using this:
sudo apt-get install python-nautilus
You may need to create the directory as well.
mkdir -p ~/.local/share/nautilus-python/extensions
Now, navigate to the newly created directory:
cd ~/.local/share/nautilus-python/extensions
Download the script:
wget https://raw.githubusercontent.com/riclc/nautilus_backspace/master/BackspaceBack.py
Finally, restart Nautilus using:
killall nautilus