Sending your connections to websites through the Tor network is not enough to totally protect you while browsing the web:
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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>To understand better the behavior of <i>Tor Browser</i>, for example, regarding JavaScript and cookies, you can refer to the <a href="https://2019.www.torproject.org/projects/torbrowser/design/"> <i>Tor Browser</i> design document</a>.</p>
<p>You can safely disregard the message, "Your browser is being managed by your organization," which appears in the <i>Tor Browser</i> preferences.</p>
<p>All this message means is that the automatic updates feature of <i>Tor Browser</i> has been disabled. This is done intentionally in Tails to make sure that no security feature or configuration gets broken by automatic updates of <i>Tor Browser</i>.</p>