diff --git a/Dockerfile b/Dockerfile
index 65602d2..edfd1a7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -322,7 +322,8 @@ RUN \
   ln -s /usr/local/lib/kasmvnc /usr/lib/kasmvncserver && \
   echo "**** openbox tweaks ****" && \
   sed -i \
-    's/NLIMC/NLMC/g' \
+    -e 's/NLIMC/NLMC/g' \
+    -e 's|</applications>|  <application class="*"><maximized>yes</maximized></application>\n</applications>|' \
     /etc/xdg/openbox/rc.xml && \
   echo "**** kasm support ****" && \
   mkdir -p /kasmbins && \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index ed8d4b0..353f96f 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -322,7 +322,8 @@ RUN \
   ln -s /usr/local/lib/kasmvnc /usr/lib/kasmvncserver && \
   echo "**** openbox tweaks ****" && \
   sed -i \
-    's/NLIMC/NLMC/g' \
+    -e 's/NLIMC/NLMC/g' \
+    -e 's|</applications>|  <application class="*"><maximized>yes</maximized></application>\n</applications>|' \
     /etc/xdg/openbox/rc.xml && \
   echo "**** kasm support ****" && \
   mkdir -p /kasmbins && \
diff --git a/root/etc/s6-overlay/s6-rc.d/init-kasmvnc-config/run b/root/etc/s6-overlay/s6-rc.d/init-kasmvnc-config/run
index 935f643..e71ec9b 100755
--- a/root/etc/s6-overlay/s6-rc.d/init-kasmvnc-config/run
+++ b/root/etc/s6-overlay/s6-rc.d/init-kasmvnc-config/run
@@ -39,9 +39,9 @@ if [[ ! -z ${NO_DECOR+x} ]] && [[ ! -f /decorlock ]]; then
 fi
 
 # Fullscreen everything in openbox unless the user explicitly disables it
-if [[ -z ${NO_FULL+x} ]] && [[ ! -f /fulllock ]]; then
+if [[ ! -z ${NO_FULL+x} ]] && [[ ! -f /fulllock ]]; then
   sed -i \
-    's|</applications>|  <application class="*"><maximized>yes</maximized></application>\n</applications>|' \
+    '/<application class="\*"><maximized>yes<\/maximized><\/application>/d' \
     /etc/xdg/openbox/rc.xml
   touch /fulllock
 fi