Exit Zen
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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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Make sure that you are:
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[[Connected to a local network|anonymous_internet/networkmanager]]
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[[Connected to the Tor network|anonymous_internet/tor]]
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<h1 id="security-level">Security levelconfinement">Security confinement</h1>
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<h1 id="confinement">Security confinement</h1>
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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 <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>
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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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The anonymity provided by *Tor Browser* works by making all users look the same to make it impossible to know who is who among the millions of users of *Tor Browser*.
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Tails tries to make it as difficult as possible for websites to distinguish Tails users from other users of *Tor Browser*. If it was possible for a website to determine whether you are a user of *Tor Browser* inside or outside of Tails, this would provide a little bit more information about you and reduce your anonymity.
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The websites that you visit can retrieve a lot of information about your browser, whether it's *Tor Browser* or a regular browser. This information is called the *fingerprint* of the browser and includes the name and version of the browser, the size of the window, the time zone, the available fonts, etc.
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