Exit Zen
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Sending your connections to websites through the Tor network is not enough to totally protect you while browsing the web:
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6
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Cookies can be used to track and identify you across different websites.
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7
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Security vulnerabilities in JavaScript have been used to [deanonymize Tor Browser in the past](https://arstechnica.com/information-technology/2013/08/attackers-wield-firefox-exploit-to-uncloak-anonymous-tor-users/).
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This is why *Tor Browser* integrates all kinds of security protections inside the browser as well.
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10
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<h1 id="proxy">The proxy server is refusing connections</h1>
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The following error message in *Tor Browser* means that Tails is not yet connected to the Tor network:
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The proxy server is refusing connections
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13
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Make sure that you are:
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14
English type: Bullet: '1. '
[[Connected to a local network|anonymous_internet/networkmanager]]
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[[Connected to the Tor network|anonymous_internet/tor]]
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17
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*Tor Browser* is only allowed to save the downloads and read the files that you
specify in the file chooser of GNOME.
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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 <i>Persistent</i> folder.
The files that you download outside of the Persistent Storage are
stored in memory (RAM), which is more limited.</p>
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<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>
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This confinement relies on 2 security technologies: *[[!debwiki AppArmor]]* and the [XDG Desktop Portals](https://flatpak.github.io/xdg-desktop-portal/) of *Flatpak*.
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<p>When opening files from the <i>/usr</i> or <i>/etc</i> folders in Tor
Browser, Tor Browser displays the following error:</p>
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<p class="command">Access to the file was denied</p>
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<h1 id="fingerprint">Hiding that you are using <i>Tor Browser</i></h1>
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It is impossible to hide to the websites that you visit that you are using Tor, because the [list of exit nodes of the Tor network is public](https://metrics.torproject.org/exonerator.html).
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That is why many more websites ask you to solve a CAPTCHA when using *Tor Browser*.
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