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[[!meta title="Tails 4.0 is out"]]
[[!meta date="Tue, 22 Oct 2019 12:34:56 +0000"]]
We are especially proud to present you Tails 4.0, the first version of Tails based on Debian 10 (Buster). It brings new versions of most of the software included in Tails and some important usability and performance improvements. Tails 4.0 introduces more changes than any other version since years.
This release also fixes [[many security issues|security/Numerous_security_holes_in_3.16]]. You should upgrade as soon as possible.
Changes and upgrades
Major changes to included software
Replace *KeePassX* with [*KeePassXC*](https://keepassxc.org/), which is more actively developed.
[[!img keepassxc.png link="no" alt=""]]
Update *OnionShare* from 0.9.2 to 1.3.2, which includes a lot of usability improvements.
[[!img onionshare.png link="no" alt=""]]
<a id="tor-browser"></a>
- Update *Tor Browser* to 9.0:
A gray border, called *letter boxing*, is now displayed around the content of web pages when you resize the window of Tor Browser.
[[!img doc/anonymous_internet/Tor_Browser/letter-boxing.png link="no" alt=""]]
Letter boxing prevents websites from identifying your browser based
on the size of its window. Letter boxing replaces the yellow warning that
was displayed until now when maximizing Tor Browser.
The onion icon has been removed from the top bar.
To switch to a new identity, choose
<span class="menuchoice">
<span class="guimenu">[[!img lib/open-menu.png class=symbolic link="no" alt=""]]</span>&nbsp;▸
<span class="guimenuitem">New Identity</span></span>.
<a id="mat"></a>
- Update *MAT* from 0.6.1 to [0.8.0](https://0xacab.org/jvoisin/mat2/blob/master/CHANGELOG.md)
*MAT* has no graphical interface of its own anymore.