/usr/share/gnome-shell/extensions/ is in gnome-shell-extensions-gpaste 3.28.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/aboutItem.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/deleteButton.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/deleteItemPart.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/dummyHistoryItem.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/emptyHistoryItem.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/extension.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/indicator.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/item.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/metadata.json
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/pageItem.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/pageSwitcher.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/prefs.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/searchItem.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/stateSwitch.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/statusIcon.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/uiItem.js