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<span class="application">[Tor Browser](https://www.torproject.org)</span> is a web
browser based on [Mozilla Firefox](https://www.mozilla.org/firefox/) but configured
to protect your privacy.
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Tor Browser é uma versão sem marca do navegador web [[Mozilla Firefox|http://www.mozilla.com/firefox/]]. Dada sua popularidade, muitos de vocês já devem tê-lo usado anteriormente e sua interface é igual a de qualquer outro navegador web moderno.
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[[!img lib/apps/tor-browser.png link=no alt=""]]
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[[!img Tor_Browser/tor-browser.png link=no alt=""]]
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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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Cookies can be used to track and identify you across different websites.
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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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Some frequently asked questions about <span class="application">Tor Browser</span> can be found in
[[the FAQ|support/faq#browser]].
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<h1 id="proxy">Proxy server 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="confinement">AppArmor confinement, downloading, and uploading files</h1>
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<span class="application">Tor Browser</span> in Tails is confined with
[[!debwiki AppArmor]] to protect the system and your data from some
types of attacks against <span class="application">Tor Browser</span>.
As a consequence, <span class="application">Tor Browser</span> in Tails can
only read and write to a limited number of folders.
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<p>This is why, for example, you might face <em>Permission
denied</em> errors if you try to download files to the
<em>Home</em> folder.</p>
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- You can save files from <span class="application">Tor
Browser</span> to the <span class="filename">Tor Browser</span> folder
that is located in the <span class="filename">Home</span> folder.
The content of this folder will disappear once you shut down Tails.
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- If you want to upload files with <span class="application">Tor
Browser</span>, copy them to that folder first.
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- If you turned on the [[Persistent Folder|persistent_storage/configure#persistent_folder]] feature of the Persistent Storage, you can also use the *Persistent/Tor Browser* folder to download and upload files from *Tor Browser*. The content of the *Persistent/Tor Browser* folder is saved across different working sessions.
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<p>To prevent Tails from running out of memory and crashing, download
very big files to the <em>Persistent/Tor Browser</em> folder.
All the files that you download outside of the Persistent Storage are
stored in memory (RAM), which is more limited.</p>
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