diff --git a/Dockerfile b/Dockerfile
index 6d4cca7..b256bca 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,24 +7,17 @@ MAINTAINER Andrey Arapov <andrey.arapov@nixaid.com>
 ENV DEBIAN_FRONTEND noninteractive
 
 # -- Install the prerequisites
-# adwaita-icon-theme is required so that cursor size is not ultra tiny
-# gnome-themes-standard and gnome-themes-standard-data are for nice GTK UI
 RUN sed -i.bak 's/jessie main/jessie main contrib/g' /etc/apt/sources.list \
     && apt-get update \
     && apt-get install -yq bzip2 libfreetype6 libfontconfig1 \
         libxrender1 libxext6 libxdamage1 libxcomposite1 libasound2 \
         libdbus-glib-1-2 libgtk2.0-0 libxt6 libcanberra-gtk-module \
+        libv4l-0 \
         pulseaudio \
-        adwaita-icon-theme \
-        gnome-themes-standard gnome-themes-standard-data \
         flashplugin-nonfree \
         fonts-droid fonts-freefont-ttf \
     && rm -rf /var/lib/apt/lists
 
-# If you do not want to use pulseaudio
-# COPY asoundrc /etc/asound.conf
-# RUN chgrp audio /etc/asound.conf && chmod 0640 /etc/asound.conf
-
 # -- Adobe Flash Plugin
 RUN update-flashplugin-nonfree --install
 
diff --git a/README.md b/README.md
index 44c7be7..c620715 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Extensions
 I have decided to add here a list of the Firefox's extensions I am using
 ```
 https://www.eff.org/privacybadger
-https://adblockplus.org/
+https://adblockultimate.net/
 ```
 
 Extra
@@ -29,3 +29,18 @@ Check the codecs
 ```
 https://www.youtube.com/html5
 ```
+
+To initialize the new Firefox profile
+```
+docker-compose run --rm firefox -P
+```
+
+Limitations
+===========
+
+X11 and PulseAudio
+------------------
+
+The user ID must match the ID of a user that runs the container,
+otherwise X neither audio will work.
+
diff --git a/docker-compose.yml b/docker-compose.yml
index 1a5b1f3..fd44d87 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5,22 +5,24 @@ services:
     build: ./
     read_only: true
     networks:
-      - net
-      - pulseaudio
+      - isolated
     devices:
       - /dev/dri
     volumes:
       - /tmp/.X11-unix:/tmp/.X11-unix
-      - /tmp/krb5cc_1000:/tmp/krb5cc_1000:ro
+      - /usr/lib/x86_64-linux-gnu/gtk-2.0/2.10.0/engines:/usr/lib/x86_64-linux-gnu/gtk-2.0/2.10.0/engines:ro
+      - /usr/share/themes:/usr/share/themes:ro
+      - /usr/share/icons:/usr/share/icons:ro
       - /var/run/cups:/var/run/cups:ro
+      # - /tmp/krb5cc_1000:/tmp/krb5cc_1000:ro
+      - /etc/machine-id:/etc/machine-id:ro
+      - /run/user/1000/pulse:/run/user/1000/pulse
       - $HOME/.mozilla:/home/firefox/.mozilla
       - $HOME/Downloads:/home/firefox/Downloads
     environment:
       DISPLAY: unix$DISPLAY
-      PULSE_SERVER: tcp:pulseaudio:4713
 
 networks:
-  net: {}
-  pulseaudio:
+  isolated:
     external:
-      name: pulseaudio_net
+      name: isolated