The exception is that the app runs under Windows 10 S – but who uses this version? But maybe someone has further reasons for this approach. At the moment I don't really see the point in getting the stuff from the store and installing it, except for one situation. Displays the mail program with which the selected mail was written This addon is compatible with Thunderbird after Web Extesnsions support. I don't need to install anything – and can even move the Thunderbird to an external hard drive or network drive to access emails or appointments from other machines. I myself have been using the Thunderbird for 10 years in a portable version. On GitHub the developers write that an installation without administrator rights is possible. The app package is a little over 126 MByte in size.

Since the Thunderbird is an open source program, the app download is available for free. The Thunderbird Store app provides mail, calendar, RSS and contact management.

They write from 'Store Port' – I guess using the Desktop Bridge. This is possible because the open source community has ported the email client to the Microsoft Store. The site HTNovo noticed this and reported about this possibility here.

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