Exit button is a Thunderbird extension that adds an exit/quit button to the toolbar and the file menu. The button is shown here underneath the File menu.
· Thunderbird 1.5 - 2.0.0.*
How to Install in Thunderbird;
1. Right-click the link below and choose "Save Link As..." to download and save the file to your hard disk.
2. In Mozilla Thunderbird, open Add-ons from the Tools menu.
3. Click the Install button, and locate/select the file you downloaded and click "OK".
After installation, right-click on the toolbar, select Customise... and drag the Exit button to the toolbar, placing it any where you want.
If you don't wish the File menu "Exit" item to show an icon, insert this into your userChrome.css file:
list-style-image: none !important;