/usr/share/gnome-shell/extensions/ is in gnome-shell-extensions 3.28.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gnome-shell/extensions/alternate-tab@gnome-shell-extensions.gcampax.github.com/
/usr/share/gnome-shell/extensions/alternate-tab@gnome-shell-extensions.gcampax.github.com/convenience.js
/usr/share/gnome-shell/extensions/alternate-tab@gnome-shell-extensions.gcampax.github.com/extension.js
/usr/share/gnome-shell/extensions/alternate-tab@gnome-shell-extensions.gcampax.github.com/metadata.json
/usr/share/gnome-shell/extensions/alternate-tab@gnome-shell-extensions.gcampax.github.com/prefs.js
/usr/share/gnome-shell/extensions/alternate-tab@gnome-shell-extensions.gcampax.github.com/stylesheet.css
/usr/share/gnome-shell/extensions/apps-menu@gnome-shell-extensions.gcampax.github.com/
/usr/share/gnome-shell/extensions/apps-menu@gnome-shell-extensions.gcampax.github.com/convenience.js
/usr/share/gnome-shell/extensions/apps-menu@gnome-shell-extensions.gcampax.github.com/extension.js
/usr/share/gnome-shell/extensions/apps-menu@gnome-shell-extensions.gcampax.github.com/metadata.json
/usr/share/gnome-shell/extensions/apps-menu@gnome-shell-extensions.gcampax.github.com/stylesheet.css
/usr/share/gnome-shell/extensions/auto-move-windows@gnome-shell-extensions.gcampax.github.com/
/usr/share/gnome-shell/extensions/auto-move-windows@gnome-shell-extensions.gcampax.github.com/convenience.js
/usr/share/gnome-shell/extensions/auto-move-windows@gnome-shell-extensions.gcampax.github.com/extension.js
/usr/share/gnome-shell/extensions/auto-move-windows@gnome-shell-extensions.gcampax.github.com/metadata.json
/usr/share/gnome-shell/extensions/auto-move-windows@gnome-shell-extensions.gcampax.github.com/prefs.js
/usr/share/gnome-shell/extensions/auto-move-windows@gnome-shell-extensions.gcampax.github.com/stylesheet.css
/usr/share/gnome-shell/extensions/drive-menu@gnome-shell-extensions.gcampax.github.com/
/usr/share/gnome-shell/extensions/drive-menu@gnome-shell-extensions.gcampax.github.com/convenience.js
/usr/share/gnome-shell/extensions/drive-menu@gnome-shell-extensions.gcampax.github.com/extension.js
/usr/share/gnome-shell/extensions/drive-menu@gnome-shell-extensions.gcampax.github.com/metadata.json
/usr/share/gnome-shell/extensions/drive-menu@gnome-shell-extensions.gcampax.github.com/stylesheet.css
/usr/share/gnome-shell/extensions/launch-new-instance@gnome-shell-extensions.gcampax.github.com/
/usr/share/gnome-shell/extensions/launch-new-instance@gnome-shell-extensions.gcampax.github.com/convenience.js
/usr/share/gnome-shell/extensions/launch-new-instance@gnome-shell-extensions.gcampax.github.com/extension.js
/usr/share/gnome-shell/extensions/launch-new-instance@gnome-shell-extensions.gcampax.github.com/metadata.json
/usr/share/gnome-shell/extensions/launch-new-instance@gnome-shell-extensions.gcampax.github.com/stylesheet.css
/usr/share/gnome-shell/extensions/native-window-placement@gnome-shell-extensions.gcampax.github.com//
/usr/share/gnome-shell/extensions/native-window-placement@gnome-shell-extensions.gcampax.github.com/convenience.js
/usr/share/gnome-shell/extensions/native-window-placement@gnome-shell-extensions.gcampax.github.com/extension.js
/usr/share/gnome-shell/extensions/native-window-placement@gnome-shell-extensions.gcampax.github.com/metadata.json
/usr/share/gnome-shell/extensions/native-window-placement@gnome-shell-extensions.gcampax.github.com/stylesheet.css
/usr/share/gnome-shell/extensions/places-menu@gnome-shell-extensions.gcampax.github.com/
/usr/share/gnome-shell/extensions/places-menu@gnome-shell-extensions.gcampax.github.com/convenience.js
/usr/share/gnome-shell/extensions/places-menu@gnome-shell-extensions.gcampax.github.com/extension.js
/usr/share/gnome-shell/extensions/places-menu@gnome-shell-extensions.gcampax.github.com/metadata.json
/usr/share/gnome-shell/extensions/places-menu@gnome-shell-extensions.gcampax.github.com/placeDisplay.js
/usr/share/gnome-shell/extensions/places-menu@gnome-shell-extensions.gcampax.github.com/stylesheet.css
/usr/share/gnome-shell/extensions/screenshot-window-sizer@gnome-shell-extensions.gcampax.github.com//
/usr/share/gnome-shell/extensions/screenshot-window-sizer@gnome-shell-extensions.gcampax.github.com/convenience.js
/usr/share/gnome-shell/extensions/screenshot-window-sizer@gnome-shell-extensions.gcampax.github.com/extension.js
/usr/share/gnome-shell/extensions/screenshot-window-sizer@gnome-shell-extensions.gcampax.github.com/metadata.json
/usr/share/gnome-shell/extensions/screenshot-window-sizer@gnome-shell-extensions.gcampax.github.com/stylesheet.css
/usr/share/gnome-shell/extensions/user-theme@gnome-shell-extensions.gcampax.github.com/
/usr/share/gnome-shell/extensions/user-theme@gnome-shell-extensions.gcampax.github.com/convenience.js
/usr/share/gnome-shell/extensions/user-theme@gnome-shell-extensions.gcampax.github.com/extension.js
/usr/share/gnome-shell/extensions/user-theme@gnome-shell-extensions.gcampax.github.com/metadata.json
/usr/share/gnome-shell/extensions/user-theme@gnome-shell-extensions.gcampax.github.com/stylesheet.css
/usr/share/gnome-shell/extensions/window-list@gnome-shell-extensions.gcampax.github.com/
/usr/share/gnome-shell/extensions/window-list@gnome-shell-extensions.gcampax.github.com/classic.css
/usr/share/gnome-shell/extensions/window-list@gnome-shell-extensions.gcampax.github.com/convenience.js
/usr/share/gnome-shell/extensions/window-list@gnome-shell-extensions.gcampax.github.com/extension.js
/usr/share/gnome-shell/extensions/window-list@gnome-shell-extensions.gcampax.github.com/metadata.json
/usr/share/gnome-shell/extensions/window-list@gnome-shell-extensions.gcampax.github.com/prefs.js
/usr/share/gnome-shell/extensions/window-list@gnome-shell-extensions.gcampax.github.com/stylesheet.css
/usr/share/gnome-shell/extensions/windowsNavigator@gnome-shell-extensions.gcampax.github.com/
/usr/share/gnome-shell/extensions/windowsNavigator@gnome-shell-extensions.gcampax.github.com/convenience.js
/usr/share/gnome-shell/extensions/windowsNavigator@gnome-shell-extensions.gcampax.github.com/extension.js
/usr/share/gnome-shell/extensions/windowsNavigator@gnome-shell-extensions.gcampax.github.com/metadata.json
/usr/share/gnome-shell/extensions/windowsNavigator@gnome-shell-extensions.gcampax.github.com/stylesheet.css
/usr/share/gnome-shell/extensions/workspace-indicator@gnome-shell-extensions.gcampax.github.com/
/usr/share/gnome-shell/extensions/workspace-indicator@gnome-shell-extensions.gcampax.github.com/convenience.js
/usr/share/gnome-shell/extensions/workspace-indicator@gnome-shell-extensions.gcampax.github.com/extension.js
/usr/share/gnome-shell/extensions/workspace-indicator@gnome-shell-extensions.gcampax.github.com/metadata.json
/usr/share/gnome-shell/extensions/workspace-indicator@gnome-shell-extensions.gcampax.github.com/prefs.js
/usr/share/gnome-shell/extensions/workspace-indicator@gnome-shell-extensions.gcampax.github.com/stylesheet.css