Tails OS 4.0 RC1 is available for testing: based on Debian 10 (Buster)

Tails OS

Tails OS is a live operating system that you can start on almost any computer from a DVD, USB stick, or SD card.

It aims at preserving your privacy and anonymity and helps you to:

  • use the Internet anonymously and circumvent censorship; all connections to the Internet are forced to go through the Tor network;
  • leave no trace on the computer you are using unless you ask it explicitly;
  • use state-of-the-art cryptographic tools to encrypt your files, emails and instant messaging.

Tails OS 4.0 RC1 has been released.


Major changes to included software

  • Update Tor Browser to 9.0a7, based on Firefox 68.1.0esr.
  • Update Electrum to 3.3.8, which works with the current Bitcoin network.
  • Update Linux to 5.3.2.
  • Update tor to

Usability improvements to Tails Greeter

We improved various aspects of the usability of Tails Greeter, especially for non-English users.

  • To make it easier to select a language, we curated the list of proposed languages by removing the ones that had too little translations to be useful.
  • We also simplified the list of keyboard layouts.
  • We fixed the Formats setting, which was not being applied.
  • We prevented additional settings to be applied when clicking on Cancel or Back.

Fixed problems

  • Fix the delivery of WhisperBack reports. (#17110)
  • Dozens of other problems — literally. For more details, read our changelog.

Known issues

  • Spellchecking only works for English. (#17150)

    To fix it, set spellchecker.dictionary_path to /usr/share/hunspell in about:config.

  • Unsafe Browser tabs have the “Private Browsing” name and the Tor Browser‘s icon. (#17142)
  • The On-screen keyboard does not allow to input any accentuated char. (#17021)
  • Other open tickets for Tails 4.0

See the list of long-standing issues.