diff --git a/.github/workflows/external_trigger.yml b/.github/workflows/external_trigger.yml
index a1d2917..49e1339 100644
--- a/.github/workflows/external_trigger.yml
+++ b/.github/workflows/external_trigger.yml
@@ -18,7 +18,7 @@ jobs:
           fi
           echo "**** External trigger running off of master branch. To disable this trigger, set a Github secret named \"PAUSE_EXTERNAL_TRIGGER_FIREFOX_MASTER\". ****"
           echo "**** Retrieving external version ****"
-          EXT_RELEASE=$(curl -sL "http://dl-cdn.alpinelinux.org/alpine/v3.15/community/x86_64/APKINDEX.tar.gz" | tar -xz -C /tmp \
+          EXT_RELEASE=$(curl -sL "http://dl-cdn.alpinelinux.org/alpine/v3.16/community/x86_64/APKINDEX.tar.gz" | tar -xz -C /tmp \
             && awk '/^P:'"firefox"'$/,/V:/' /tmp/APKINDEX | sed -n 2p | sed 's/^V://')
           if [ -z "${EXT_RELEASE}" ] || [ "${EXT_RELEASE}" == "null" ]; then
             echo "**** Can't retrieve external version, exiting ****"
diff --git a/Dockerfile b/Dockerfile
index 5284dce..f124034 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM lsiobase/rdesktop-web:alpine
+FROM ghcr.io/linuxserver/baseimage-rdesktop-web:3.16
 
 # set version label
 ARG BUILD_DATE
@@ -9,17 +9,14 @@ LABEL maintainer="thelamer"
 
 RUN \
   echo "**** install packages ****" && \
-  apk add --no-cache --virtual=build-dependencies \
-    curl && \
   if [ -z ${FIREFOX_VERSION+x} ]; then \
-    FIREFOX_VERSION=$(curl -sL "http://dl-cdn.alpinelinux.org/alpine/v3.15/community/x86_64/APKINDEX.tar.gz" | tar -xz -C /tmp \
+    FIREFOX_VERSION=$(curl -sL "http://dl-cdn.alpinelinux.org/alpine/v3.16/community/x86_64/APKINDEX.tar.gz" | tar -xz -C /tmp \
     && awk '/^P:firefox$/,/V:/' /tmp/APKINDEX | sed -n 2p | sed 's/^V://'); \
   fi && \
   apk add --no-cache \
     firefox==${FIREFOX_VERSION} && \
+  sed -i 's|</applications>|  <application title="Mozilla Firefox" type="normal">\n    <maximized>yes</maximized>\n  </application>\n</applications>|' /etc/xdg/openbox/rc.xml && \
   echo "**** cleanup ****" && \
-  apk del --purge \
-    build-dependencies && \
   rm -rf \
     /tmp/*
 
@@ -28,4 +25,5 @@ COPY /root /
 
 # ports and volumes
 EXPOSE 3000
+
 VOLUME /config
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 9c7bee7..461cfe2 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -1,4 +1,4 @@
-FROM lsiobase/rdesktop-web:arm64v8-alpine
+FROM ghcr.io/linuxserver/baseimage-rdesktop-web:arm64v8-3.16
 
 # set version label
 ARG BUILD_DATE
@@ -9,17 +9,14 @@ LABEL maintainer="thelamer"
 
 RUN \
   echo "**** install packages ****" && \
-  apk add --no-cache --virtual=build-dependencies \
-    curl && \
   if [ -z ${FIREFOX_VERSION+x} ]; then \
-    FIREFOX_VERSION=$(curl -sL "http://dl-cdn.alpinelinux.org/alpine/v3.15/community/x86_64/APKINDEX.tar.gz" | tar -xz -C /tmp \
+    FIREFOX_VERSION=$(curl -sL "http://dl-cdn.alpinelinux.org/alpine/v3.16/community/x86_64/APKINDEX.tar.gz" | tar -xz -C /tmp \
     && awk '/^P:firefox$/,/V:/' /tmp/APKINDEX | sed -n 2p | sed 's/^V://'); \
   fi && \
   apk add --no-cache \
     firefox==${FIREFOX_VERSION} && \
+  sed -i 's|</applications>|  <application title="Mozilla Firefox" type="normal">\n    <maximized>yes</maximized>\n  </application>\n</applications>|' /etc/xdg/openbox/rc.xml && \
   echo "**** cleanup ****" && \
-  apk del --purge \
-    build-dependencies && \
   rm -rf \
     /tmp/*
 
@@ -28,4 +25,5 @@ COPY /root /
 
 # ports and volumes
 EXPOSE 3000
+
 VOLUME /config
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index be073f4..2672342 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -1,4 +1,4 @@
-FROM lsiobase/rdesktop-web:arm32v7-alpine
+FROM ghcr.io/linuxserver/baseimage-rdesktop-web:arm32v7-3.16
 
 # set version label
 ARG BUILD_DATE
@@ -9,17 +9,14 @@ LABEL maintainer="thelamer"
 
 RUN \
   echo "**** install packages ****" && \
-  apk add --no-cache --virtual=build-dependencies \
-    curl && \
   if [ -z ${FIREFOX_VERSION+x} ]; then \
-    FIREFOX_VERSION=$(curl -sL "http://dl-cdn.alpinelinux.org/alpine/v3.15/community/x86_64/APKINDEX.tar.gz" | tar -xz -C /tmp \
+    FIREFOX_VERSION=$(curl -sL "http://dl-cdn.alpinelinux.org/alpine/v3.16/community/x86_64/APKINDEX.tar.gz" | tar -xz -C /tmp \
     && awk '/^P:firefox$/,/V:/' /tmp/APKINDEX | sed -n 2p | sed 's/^V://'); \
   fi && \
   apk add --no-cache \
     firefox==${FIREFOX_VERSION} && \
+  sed -i 's|</applications>|  <application title="Mozilla Firefox" type="normal">\n    <maximized>yes</maximized>\n  </application>\n</applications>|' /etc/xdg/openbox/rc.xml && \
   echo "**** cleanup ****" && \
-  apk del --purge \
-    build-dependencies && \
   rm -rf \
     /tmp/*
 
@@ -28,4 +25,5 @@ COPY /root /
 
 # ports and volumes
 EXPOSE 3000
+
 VOLUME /config
diff --git a/Jenkinsfile b/Jenkinsfile
index 1341be5..e4bc261 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -25,8 +25,8 @@ pipeline {
     DEV_DOCKERHUB_IMAGE = 'lsiodev/firefox'
     PR_DOCKERHUB_IMAGE = 'lspipepr/firefox'
     DIST_IMAGE = 'alpine'
-    DIST_TAG = '3.15'
-    DIST_REPO = 'http://dl-cdn.alpinelinux.org/alpine/v3.15/community/'
+    DIST_TAG = '3.16'
+    DIST_REPO = 'http://dl-cdn.alpinelinux.org/alpine/v3.16/community/'
     DIST_REPO_PACKAGES = 'firefox'
     MULTIARCH = 'true'
     CI = 'true'
diff --git a/README.md b/README.md
index 36c0908..cc9388a 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,8 @@ services:
   firefox:
     image: lscr.io/linuxserver/firefox:latest
     container_name: firefox
+    security_opt:
+      - seccomp:unconfined #optional
     environment:
       - PUID=1000
       - PGID=1000
@@ -98,6 +100,7 @@ services:
 ```bash
 docker run -d \
   --name=firefox \
+  --security-opt seccomp=unconfined `#optional` \
   -e PUID=1000 \
   -e PGID=1000 \
   -e TZ=Europe/London \
@@ -120,6 +123,7 @@ Container images are configured using parameters passed at runtime (such as thos
 | `-e TZ=Europe/London` | Specify a timezone to use EG Europe/London. |
 | `-v /config` | Users home directory in the container, stores local files and settings |
 | `--shm-size=` | This is needed for any modern website to function like youtube. |
+| `--security-opt seccomp=unconfined` | For Docker Engine only, many modern gui apps need this to function as syscalls are unkown to Docker. |
 
 ## Environment variables from files (Docker secrets)
 
@@ -230,6 +234,7 @@ Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64
 
 ## Versions
 
+* **21.10.22:** - Rebase to Alpine 3.16, migrate to s6v3.
 * **23.12.21:** - Rebase to Alpine 3.15, stop using ESR.
 * **26.09.21:** - Rebase to Alpine 3.14.
 * **19.04.21:** - Initial release.
diff --git a/jenkins-vars.yml b/jenkins-vars.yml
index d752d7e..413f1a0 100644
--- a/jenkins-vars.yml
+++ b/jenkins-vars.yml
@@ -15,8 +15,8 @@ repo_vars:
   - DEV_DOCKERHUB_IMAGE = 'lsiodev/firefox'
   - PR_DOCKERHUB_IMAGE = 'lspipepr/firefox'
   - DIST_IMAGE = 'alpine'
-  - DIST_TAG = '3.15'
-  - DIST_REPO = 'http://dl-cdn.alpinelinux.org/alpine/v3.15/community/'
+  - DIST_TAG = '3.16'
+  - DIST_REPO = 'http://dl-cdn.alpinelinux.org/alpine/v3.16/community/'
   - DIST_REPO_PACKAGES = 'firefox'
   - MULTIARCH = 'true'
   - CI = 'true'
diff --git a/readme-vars.yml b/readme-vars.yml
index 662eb68..5a645ea 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -31,6 +31,9 @@ param_ports:
   - { external_port: "3000", internal_port: "3000", port_desc: "Firefox desktop gui." }
 custom_params:
   - { name: "shm-size", name_compose: "shm_size", value: "1gb",desc: "This is needed for any modern website to function like youtube." }
+opt_security_opt_param: true
+opt_security_opt_param_vars:
+  - { run_var: "seccomp=unconfined", compose_var: "seccomp:unconfined", desc: "For Docker Engine only, many modern gui apps need this to function as syscalls are unkown to Docker." }
 
 # application setup block
 app_setup_block_enabled: true
@@ -45,6 +48,7 @@ app_setup_block: |
 
 # changelog
 changelogs:
+  - { date: "21.10.22:", desc: "Rebase to Alpine 3.16, migrate to s6v3." }
   - { date: "23.12.21:", desc: "Rebase to Alpine 3.15, stop using ESR." }
   - { date: "26.09.21:", desc: "Rebase to Alpine 3.14." }
   - { date: "19.04.21:", desc: "Initial release." }
diff --git a/root/etc/s6-overlay/s6-rc.d/init-config-end/dependencies.d/init-openboxcopy b/root/etc/s6-overlay/s6-rc.d/init-config-end/dependencies.d/init-openboxcopy
new file mode 100644
index 0000000..e69de29
diff --git a/root/etc/s6-overlay/s6-rc.d/init-openboxcopy/dependencies.d/init-config b/root/etc/s6-overlay/s6-rc.d/init-openboxcopy/dependencies.d/init-config
new file mode 100644
index 0000000..e69de29
diff --git a/root/etc/cont-init.d/56-openboxcopy b/root/etc/s6-overlay/s6-rc.d/init-openboxcopy/run
old mode 100644
new mode 100755
similarity index 78%
rename from root/etc/cont-init.d/56-openboxcopy
rename to root/etc/s6-overlay/s6-rc.d/init-openboxcopy/run
index f22df65..e7504d5
--- a/root/etc/cont-init.d/56-openboxcopy
+++ b/root/etc/s6-overlay/s6-rc.d/init-openboxcopy/run
@@ -1,7 +1,8 @@
 #!/usr/bin/with-contenv bash
 
 # default file copies first run
-[[ ! -f /config/.config/openbox/menu.xml ]] && \
+if [[ ! -f /config/.config/openbox/menu.xml ]]; then
     mkdir -p /config/.config/openbox && \
     cp /defaults/menu.xml /config/.config/openbox/menu.xml && \
     chown -R abc:abc /config/.config
+fi
diff --git a/root/etc/s6-overlay/s6-rc.d/init-openboxcopy/type b/root/etc/s6-overlay/s6-rc.d/init-openboxcopy/type
new file mode 100644
index 0000000..3d92b15
--- /dev/null
+++ b/root/etc/s6-overlay/s6-rc.d/init-openboxcopy/type
@@ -0,0 +1 @@
+oneshot
\ No newline at end of file
diff --git a/root/etc/s6-overlay/s6-rc.d/init-openboxcopy/up b/root/etc/s6-overlay/s6-rc.d/init-openboxcopy/up
new file mode 100644
index 0000000..c5a506f
--- /dev/null
+++ b/root/etc/s6-overlay/s6-rc.d/init-openboxcopy/up
@@ -0,0 +1 @@
+/etc/s6-overlay/s6-rc.d/init-openboxcopy/run
\ No newline at end of file
diff --git a/root/etc/s6-overlay/s6-rc.d/user/contents.d/init-openboxcopy b/root/etc/s6-overlay/s6-rc.d/user/contents.d/init-openboxcopy
new file mode 100644
index 0000000..e69de29