Since Tails 7.5 (February 2026), Tails tries to automatically install *Thunderbird* as [[additional software|persistent_storage/additional_software]] to improve its security.
<input type="checkbox" id="menu-about-requirements"/><label for="menu-about-requirements">[[System requirements and recommended USB sticks|doc/about/requirements]]</label>
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<div class="linux"> For example, you can press the <b>Super</b> ([[!img lib/start.png class="symbolic" link="no" alt=""]]) key, then typeenter <code>disks</code> and chooseselect <b>Disks</b>. </div> <div class="upgrade"> Choose <b>Applications ▸ Utilities ▸ Disks</b>. </div>
<div class="linux"> For example, you can press the <b>Super</b> ([[!img lib/start.png class="symbolic" link="no" alt=""]]) key, then enter <code>disks</code> and select <b>Disks</b>. </div> <div class="upgrade"> Choose <b>Apps ▸ Utilities ▸ Disks</b>. </div>
A new version of *Thunderbird* is released in Debian shortly after each Tails release, because both *Tails* and *Thunderbird* follow the [[release calendar of *Firefox*|https://whattrainisitnow.com/calendar/]]. As a consequence, until Tails 7.5 (February 2026), the version of *Thunderbird* in Tails was almost always outdated, with known security vulnerabilities.
When you shut down Tailith both techniques, all the data stored in [[!wikipedia Random-access_memory
desc="RAM"]] is securelyerased to protect you from [[cold boot attacks|doc/advanced_topics/cold_boot_attacks]].
With both techniques, all the data stored in [[!wikipedia Random-access_memory desc="RAM"]] is securely erased to protect you from [[cold boot attacks|doc/advanced_topics/cold_boot_attacks]].