Thunderbird is configured to automatically check for updates to the application and any installed add-ons.
By default, Thunderbird is configured to automatically check for updates.
- If updates are available, the Software Update dialog will be displayed containing details about these updates. To update Thunderbird, click and the selected updates will be downloaded and installed.
- To finish the install process, you need to restart (close and re-open) Thunderbird by clicking .
- When Thunderbird restarts, the updates will have been installed.
Manually check for updates
At any time, you can check for updates.
- Go over to the menu and select .On the menu bar click the menu and select .At the top of the Thunderbird window click the menu and select .
Based on information from Software Update (mozillaZine KB)