See also our explanation about [[why Tails uses Tor|doc/anonymous_internet/tor/why#relationship]].
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Ubuntu adds features in ways that we find dangerous for privacy. For anexampleUbuntu One ([partly discontinued](http://blog.canonical.com/2014/04/02/shutting-down-ubuntu-one-file-services/))and the [, see [EFF: Privacy in Ubuntu 12.10,Amazon aAds and dData lLeaks](https://www.eff.org/deeplinks/2012/10/privacy-ubuntu-1210-amazon-ads-and-data-leaks).
Ubuntu adds features in ways that we find dangerous for privacy. For an example, see [EFF: Privacy in Ubuntu 12.10, Amazon Ads and Data Leaks](https://www.eff.org/deeplinks/2012/10/privacy-ubuntu-1210-amazon-ads-and-data-leaks).
Yes. Tails requires a USB stick dedicated to running Tails only.
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It is impossible to verify the integrity of a Tails USB stick or DVD while running Tails from it. It would be like asking tosomeone whether they are lying: a true liar would always pretend to tell the truth.
It is impossible to verify the integrity of a TailsUSB stick or DVD while running Tails from it. It would be like asking someone whether they are lying: a true liar would always pretend to tell the truth.
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If you worry that your Tails might be corrupted, do a [[manual upgrade|doc/upgrade]] from a trusted operating system to upgrade it to a trusted version of Tails.
If you worry that your Tails might be corrupted, do a [[manual upgrade|doc/upgrade]] from a trusted operating system to upgrade it to a trusted version of Tails.
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<h2 id="javascript">Why is JavaScript enabled by default in <span class="application"i>Tor Browser</spani>?</h2>
4. They can break your anonymity by making your browsing behaviour distinguishable from other Tails users.
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Unless proven otherwise, no add-on, apart from the ones already included in Tails, haves been seriously audited and should be considered safe to use in this context.
Unless proven otherwise, no add-on, apart from the ones already included in Tails, has been seriously audited and should be considered safe to use in this context.
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<h2 id="update-add-ons">Should I manually update add-ons included in <span class="application"i>Tor Browser</spani>?</h2>
Updating add-ons in *Tor Browser* might break the security built into Tails.
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As explained in our documentation about [[the fingerprint of *Tor Browser* in Tails|doc/anonymous_internet/Tor_Browser#fingerprint]], Tails provides anonymity by making it difficult to distinguish a particular user amongst allyou from other users of <span class="application">*Tor Browser</span>* (either in Tails or on other operating systems).
As explained in our documentation about [[the fingerprint of *Tor Browser* in Tails|doc/anonymous_internet/Tor_Browser#fingerprint]], Tails provides anonymity by making it difficult to distinguish you from other users of *Tor Browser* (either in Tails or on other operating systems).
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The clock of the computer needs to be set at the correct time tofor both: