[[!meta title="Browsing the web with Tor Browser"]]

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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.

[[!img lib/apps/tor-browser.png link=no alt=""]]

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.

Some frequently asked questions about <span class="application">Tor Browser</span> can be found in
[[the FAQ|support/faq#browser]].

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>

<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>

<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*.