MarsSeed [1] filed a deletion request for gnome-shell-extension- simple-net-speed [2]:
Defunct, and seems EOL since last year. Even upstream's latest master branch commit version is not compatible with current gnome-shell 47+. [a] [a]: http://github.com/biji/simplenetspeed/blob/master/metadata.json [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/gnome-shell-extension-simple-net-speed/