This extension add a "Compact Menu" button to the navigation toolbar, and hide the menu bar. To press the button or Alt-key then "Menu" open. After installation, a "Compact Menu" button is added to left side of the navigation toolbar. If you want to customize it or, right-click on menubar and choose "Customize...", drag "Menu" button, "Compact Menu" button, "Bookmarks" button to the position where
![Compact Menu 2 :: Firefox Add-ons](https://cdn-ak-scissors.b.st-hatena.com/image/square/9f63b0a9b56d02934d5d950af0f18a007bcc665c/height=288;version=1;width=512/https%3A%2F%2Faddons.cdn.mozilla.net%2Fuser-media%2Fpreviews%2Ffull%2F22%2F22602.png%3Fmodified%3D1530208348)