This is an extension for Pale Moon web browser, which toolbarizes the app menu button and makes it freely movable. It simply removes the original app menu button from the browser's title bar or a tab bar and provides an Australis-like toolbar button as a replacement.
The toolbar button is located on the far right of the navigation bar by default. You can enter customization mode and drag it to any place you want.
Appearance of the toolbar button can be changed in the extension's preferences. There are few icon themes available. You can also enable or disable displaying of a dropdown mark next to the toolbar button.