♻️ update to Firefox 68

Dockerfile

@@ -1,7 +1,7 @@
 FROM ubuntu:disco
 
 RUN apt-get update && \
-    apt-get --no-install-recommends --yes install firefox=67\* dumb-init socat fontconfig && \
+    apt-get --no-install-recommends --yes install firefox=68\* dumb-init socat fontconfig && \
     groupadd firefox && \
     useradd --create-home --gid firefox firefox && \
     chown --recursive firefox:firefox /home/firefox/

readme.md

@@ -1,12 +1,12 @@
-[![version](https://img.shields.io/badge/firefox-67-green.svg?style=flat-square)](https://packages.ubuntu.com/disco/firefox) [![build](https://img.shields.io/docker/build/deepsweet/firefox-headless-remote.svg?label=build&style=flat-square)](https://hub.docker.com/r/deepsweet/firefox-headless-remote/) [![size](https://img.shields.io/microbadger/image-size/deepsweet/firefox-headless-remote.svg?label=size&style=flat-square)](https://microbadger.com/images/deepsweet/firefox-headless-remote)
+[![version](https://img.shields.io/badge/firefox-68-green.svg?style=flat-square)](https://packages.ubuntu.com/disco/firefox) [![build](https://img.shields.io/docker/build/deepsweet/firefox-headless-remote.svg?label=build&style=flat-square)](https://hub.docker.com/r/deepsweet/firefox-headless-remote/) [![size](https://img.shields.io/microbadger/image-size/deepsweet/firefox-headless-remote.svg?label=size&style=flat-square)](https://microbadger.com/images/deepsweet/firefox-headless-remote)
 
 Dockerized Firefox in headless [Marionette](https://vakila.github.io/blog/marionette-act-i-automation/) mode.
 
 ## Usage
 
 ```sh
-docker pull deepsweet/firefox-headless-remote:67
-docker run -it --rm --shm-size 2g -p 2828:2828 deepsweet/firefox-headless-remote:67
+docker pull deepsweet/firefox-headless-remote:68
+docker run -it --rm --shm-size 2g -p 2828:2828 deepsweet/firefox-headless-remote:68
 ```
 
 Example using [Foxr](https://github.com/deepsweet/foxr):