For example, thanks to this confinement, even if an attacker manages to exploit a security vulnerability in *Tor Browser*, they wouldn't be able to access all the content of your Persistent Storage.
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<p>To prevent Tails from running out of memory and crashing, download very big files to the <emi>Persistent/Tor Browser</em</i> folder. All tThe files that you download outside of the Persistent Storage are stored in memory (RAM), which is more limited.</p>
<p>To prevent Tails from running out of memory and crashing, download very big files to the <i>Persistent</i> folder. The files that you download outside of the Persistent Storage are stored in memory (RAM), which is more limited.</p>
<p>In [[Tails 6.14.1|news/version_6.14.1]] (April 2025), we improved the previous confinement and you can now safely download to and read from any folder in your <i>Home</i> folder or Persistent Storage.</p>
This confinement relies on 2 security technologies: *[[!debwiki AppArmor]]* and the [XDG Desktop Portals](https://flatpak.github.io/xdg-desktop-portal/) of *Flatpak*.
[Tor Browser User Manual: Secure Connections](https://tb-manual.torproject.org/secure-connections/)
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To change the security level, click on the [[!img security-level.png class="symbolic" link="no"]] icon on the right of the address bar and choose <span class="guilabel">Advanced Security **Settings…</span>**.
To change the security level, click on the [[!img security-level.png class="symbolic" link="no"]] icon on the right of the address bar and choose **Settings…**.
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To switch to a new identity, choose <span class="menuchoice"> <span class="guimenu">[[!img lib/open-menu.png alt=""Open Application Menu" class="symbolic" link="no"]]</span> ▸ <span class="guimenuitem"> ▸ **New Iidentity</span></span>**.
