nwg-shell 0.4.2
The installer bash script now allows to select the file manager, text editor and web browser from menus of popular apps. That's why it can no longer be redirected to bash, and needs to be saved on your local drive. However, you can still do it in a single line:
wget https://raw.github.com/nwg-piotr/nwg-shell/main/install/arch.sh && chmod u+x arch.sh && ./arch.sh && rm arch.sh