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<h1 id="proxy">The proxy server is refusing connections</h1>
 
The following error message in *Tor Browser* means that Tails is not yet connected to the Tor network:
 
The proxy server is refusing connections
 
Make sure that you are:
 
[[Connected to a local network|anonymous_internet/networkmanager]]
 
[[Connected to the Tor network|anonymous_internet/tor]]
 
<h1 id="confinement">Security confinement</h1>
<a id="new_identity"></a>
*Tor Browser* is only allowed to save the downloads and read the files that you
specify in the file chooser of GNOME.
 
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.
 
<div class="tip">
<div class="tip">
<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>
 
</div>
</div>
<div class="note">
<div class="note">
<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*.
 
<div class="bug">
<div class="tip">
<p>When opening files from the <i>/usr</i> or <i>/etc</i> folders in Tor
Browser, Tor Browser displays the following error:</p>
 
<pre>Access to the file was denied</pre>
 
<h1 id="fingerprint">Hiding that you are using <i>Tor Browser</i></h1>
 
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).
 
That is why many more websites ask you to solve a CAPTCHA when using *Tor Browser*.
 
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*.
 
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.
 
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.
 
To make it difficult to distinguish Tails users from other users of *Tor Browser*, *Tor Browser* in Tails tries to provide the same information as *Tor Browser* on other operating systems.
 
<!--
<!--
Refer to the [[fingerprint section of our list of known issues |support/known_issues#fingerprint]] to know if there are differences between the fingerprints of *Tor Browser* inside and outside of Tails.
 
-->
-->
A difference is that Tails includes the *uBlock Origin* extension, which removes advertisements. If an attacker can determine that you are not downloading the advertisements that are included in a webpage, that could reveal that you are a Tails user.
 
<div class="next">
<div class="next">
<p>To hide to someone monitoring your Internet connection that you are
connecting to Tor, see our documentation about [[connecting to the Tor
network|tor]].</p>
 

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04/21/2025
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String information

Source string description
type: Plain text
Flags
no-wrap
Unit identifier
721320
String age
04/21/2025
Last updated
04/21/2025
Source string age
04/21/2025
Translation file gettext PO file
wiki/src/doc/anonymous_internet/Tor_Browser.ar.po, string 25