/usr/share/gnome-shell/extensions/ is in gnome-shell-extension-tilix-shortcut 1.0.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gnome-shell/extensions/TilixKeyboardShortcut@jonathan.bluemosh.com/
/usr/share/gnome-shell/extensions/TilixKeyboardShortcut@jonathan.bluemosh.com/extension.js
/usr/share/gnome-shell/extensions/TilixKeyboardShortcut@jonathan.bluemosh.com/metadata.json
/usr/share/gnome-shell/extensions/TilixKeyboardShortcut@jonathan.bluemosh.com/prefs.js
/usr/share/gnome-shell/extensions/TilixKeyboardShortcut@jonathan.bluemosh.com/schemas/
/usr/share/gnome-shell/extensions/TilixKeyboardShortcut@jonathan.bluemosh.com/schemas/gschemas.compiled
/usr/share/gnome-shell/extensions/TilixKeyboardShortcut@jonathan.bluemosh.com/schemas/org.gnome.shell.extensions.tilix-keyboard-shortcut.gschema.xml
/usr/share/gnome-shell/extensions/TilixKeyboardShortcut@jonathan.bluemosh.com/utils.js