Thunderbird’s update system checks to see if you’re running the latest version, and notifies you when a security update is available. These security updates are small (usually 200KB - 700KB), giving you only what you need and making the security update quick to download and install. The automated update system provides updates for Thunderbird on Windows, OS X, and Linux in over 40 different languages.
Thunderbird 的更新系统会检查您用的是否是最新版本，并在有安全更新推出时通知您。安全更新通常较小（约为 200KB - 700KB），您可以快速下载安裝。此自动更新系统会为 Windows、OS X 及 Linux 平台上超过 40 种语言的 Thunderbird 提供服务。