When you receive untrusted documents, for example, email attachments, *[Dangerzone](https://dangerzone.rocks/)* allows you to convert them into safe PDFs before opening.
*Dangerzone* is an essential tool and is built by great people. It was first written by [Micah Lee](https://micahflee.com/about/) to protect investigative journalists while working at [The Intercept](https://theintercept.com/). *Dangerzone* is now maintained by [Freedom of the Press Foundation](https://freedom.press), a non-profit that protects public-interest journalism. Edward Snowden and Laura Poitras are on its Board of Directors.
It's totally the kind of software that aligns with [[our mission|contribute/mission]]. The only reason why we are not including *Dangerzone* in Tails by default is because *Dangerzone* is too big and not available in Debian.
So, we collaborated with Alex Pyrgiotis from Freedom of the Press Foundation to make it as easy as possible to install *Dangerzone* in Tails as [[Additional Software|doc/persistent_storage/additional_software]]. The setup requires using the command line, but, after that, *Dangerzone* will install automatically every time you start Tails.
It's also the first time that we recommend installing a 3rd party package that is not available in Debian. We know that a lot of software that would be useful for our users is not readily available in Debian. If this first experiment is successful, we might document more such packages.
