Display the Thunderbird button menu instead of the menu toolbar
The Thunderbird button is available on all supported versions of Mac OS X.
The Thunderbird button is a new feature added in Thunderbird 17 to replace the Menu Bar. It takes the most common functions and puts them in one menu. This saves vertical space. This article describes how to enable it if you don't see it.
Note: This applies to the latest Firefox version which can be downloaded from mozilla.org/firefox.
To make Thunderbird look like other Windows XP programs, the Menu Bar is displayed instead of the Thunderbird button, while, on Windows Vista and Windows 7 and Windows 8, the Thunderbird button is displayed by default.On Linux the Thunderbird button is displayed by default
How to get it?
Simple! Just turn off the Menu Bar! Here's how:
Right-click on an empty section of the Tab Strip and uncheck Menu Bar in the pop-up menu.
I've tried it and I want to go back
If you prefer the Menu Bar, just turn the Menu Bar back on.
Right-click on an empty section of the Tab Strip and check Menu Bar in the pop-up menu.