Sending your connections to websites through the Tor network is not enough to totally protect you while browsing the web:

Cookies can be used to track and identify you across different websites.

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/).

This is why *Tor Browser* integrates all kinds of security protections inside the browser as well.

<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">AppArmor confinement, downloading, and uploading files</h1>

*Tor Browser* can only read and write to the following folders:

- *Persistent/Tor Browser*, if you have a Persistent Storage

This is because, in Tails, *Tor Browser* is confined using *[[!debwiki AppArmor]]* to protect your files from some types of attacks against *Tor Browser*.

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.

<p>This is why you get the following error if you try to download files to
another folder:</p>

<p class="code">Could not read the contents of <span class="command-placeholder">folder</span>.</p>

<p class="code">Error opening directory <span class="command-placeholder">folder</span>: Permission denied</p>

If you want to download a file from *Tor Browser*, save it to one of these folders.

If you want to upload a file from *Tor Browser*, copy it first to one of these folders.