Close All Tabs Button
https://addons.mozilla.org/ja/firefox/addon/close-all-button/
Gesturefy
https://addons.mozilla.org/ja/firefox/addon/gesturefy/
Yet Another Smooth Scrolling WE
https://addons.mozilla.org/ja/firefox/addon/yass-we/
FoxyTab
https://addons.mozilla.org/ja/firefox/addon/foxytab/
Tab Sidebar
https://addons.mozilla.org/ja/firefox/addon/tab-sidebar-we/
Parent Path
https://addons.mozilla.org/ja/firefox/addon/parent-path/