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[[!meta title="Why is Tails installing Thunderbird as additional software?"]]
 
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[[!img failure.png class="screenshot" alt="Thunderbird Migration: Tails failed to install Thunderbird as additional software."]]
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Please [[report an error|first_steps/whisperback]] to help us troubleshoot your problem.
02/26/2026
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If the **Thunderbird Migration** notification below appears when you start Tails, it means that Tails failed to install *Thunderbird* as additional software for unknown reasons.
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Failed migration
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[[!img manual.png class="screenshot" alt="Thunderbird Migration: You should install Thunderbird as additional software."]]
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Select **Install as Additional Software** next time you start Tails to turn on the Additional Software feature of your Persistent Storage and add *Thunderbird* to your list of additional software.
02/26/2026
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If the **Thunderbird Migration** notification below appears when you start Tails, it means that Tails failed to install *Thunderbird* as additional software because the [[Additional Software|persistent_storage/additional_software]] feature of your Persistent Storage is turned off.
02/26/2026
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Manual migration
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[[!img success.png class="screenshot" alt="Thunderbird Migration: Tails installed Thunderbird as additional software to improve its security."]]
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If the **Thunderbird Migration** dialog below appears when you start *Thunderbird*, it means that Tails successfully installed *Thunderbird* as additional software.
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Successful migration
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[[!toc startlevel=2]]
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By installing *Thunderbird* as additional software, the latest version of *Thunderbird* is installed automatically from your Persistent Storage each time you start Tails.
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Since Tails 7.5 (February 2026), Tails tries to automatically install *Thunderbird* as [[additional software|persistent_storage/additional_software]] to improve its security.
02/26/2026
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[[!meta title="Why is Tails installing Thunderbird as additional software?"]]
02/26/2026
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Alert triggered
No file mask matches. 02/26/2026
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Alert triggered
Component seems unused. 02/25/2026
weblate:commit

Changes committed
Changes committed 02/17/2026
weblate:commit

Changes committed
Changes committed 02/17/2026

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