raspbarry pi - install & run firefox under docker container

[lpt2007]

I used raspbian-desktop from this link:
https://www.raspberrypi.org/downloads/raspbian/

I enabled ssh with:

sudo systemctl enable ssh

I update host system:

sudo apt-get -y update
sudo apt-get -y upgrade

run raspi-config:
sudo raspi-config

go to -> "Interfacing Options" -> "Camera" -> Enable,
go to -> "Advanced Options" -> "Memory Split" -> 256
go to -> "Finish" -> "Reboot"

I installed docker:

curl -fsSL get.docker.com -o get-docker.sh && sh get-docker.sh
sudo usermod -aG docker pi

I Installed x11docker:

wget https://raw.githubusercontent.com/mviereck/x11docker/master/x11docker -O /tmp/x11docker
sudo bash /tmp/x11docker --update
rm /tmp/x11docker

I create folders:

mkdir /home/pi/docker
mkdir /home/pi/docker/firefox

create and edit Dockerfile:
nano /home/pi/docker/firefox/Dockerfile

add this:

FROM raspbian/stretch
RUN apt-get update && apt-get dist-upgrade -y
RUN apt-get install -y firefox-esr
CMD firefox-esr

build docker container:
sudo docker build -t firefox /home/pi/docker/firefox

from ssh I run this:

sudo x11docker --xorg firefox