Auto hide tab-bar in Mozilla Thunderbird 3

Having tabs in Mozilla’s Thunderbird 3 email client is a nice feature, but for the most part I hardly ever use them. I’ve find that they are bulky and take up a lot of space. Here’s a quick way to disable them:

• Open Thunderbird’s Preferences window (Tools -> Options on Windows, Edit -> Preferences on Linux and Thunderbird -> Preferences on Mac)
• Click on “Advanced”
• Click on the “Config Editor” button (which is under the “General” tab)
• Search for “mail.tabs.autoHide”
• Double-click on the setting so that it becomes “true” (and the font changes to bold)

Enjoy.