Some of the program's features may confuse inexperienced users.
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When the update is ready to install, click on Restart Thunderbird to Update. Thunderbird is a complete and comprehensive email client that will help you manage your emails and stay safe, thanks to the many security features it has. Next, in the pop-up window, you will see that the software is checking for updates. To do so, launch the program and go to menu bar and select About Thunderbird.