On Wed, May 22, 2019 at 10:12:08AM -0300, Guilherme Vieira wrote: > - firefox-esr version: 60.6.1esr-1~deb9u1
> This is my *sources.list*: > > deb http://security.debian.org/debian-security stretch/updates main > deb-src http://security.debian.org/debian-security stretch/updates main > > # deb http://deb.debian.org/debian/ stretch-updates main > # deb-src http://deb.debian.org/debian/ stretch-updates main > deb [arch=amd64] https://download.docker.com/linux/debian stretch stable > # deb-src [arch=amd64] https://download.docker.com/linux/debian stretch > stable The main issue here is that your stretch-updates sources are commented out. Uncomment them, and apt-get update. Also someone did something involving docker. I am not even going to guess what that's all about.
