[Trisquel-users] Is tails a libre os?

[tomlukeywood]

Tails seems to be compleatly license under the gpl
https://tails.boum.org/doc/about/license/index.en.html
so why is it not promoted on gnu's website?:
https://www.gnu.org/distros/free-distros.html

dose it include non-free firmware?