diff --git a/Dockerfile b/Dockerfile
index 2a9901e..46d0163 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -20,41 +20,14 @@ ARG DOCKER_IMAGE_VERSION=
 
 # Define software versions.
 ARG FIREFOX_VERSION=109.0.1-r0
-ARG JSONLZ4_VERSION=c4305b8
-ARG LZ4_VERSION=1.8.1.2
 #ARG PROFILE_CLEANER_VERSION=2.36
 
 # Define software download URLs.
-ARG JSONLZ4_URL=https://github.com/avih/dejsonlz4/archive/${JSONLZ4_VERSION}.tar.gz
-ARG LZ4_URL=https://github.com/lz4/lz4/archive/v${LZ4_VERSION}.tar.gz
 #ARG PROFILE_CLEANER_URL=https://github.com/graysky2/profile-cleaner/raw/v${PROFILE_CLEANER_VERSION}/common/profile-cleaner.in
 
 # Define working directory.
 WORKDIR /tmp
 
-# Install JSONLZ4 tools.
-RUN \
-    add-pkg --virtual build-dependencies \
-        curl \
-        build-base \
-        && \
-    mkdir jsonlz4 && \
-    mkdir lz4 && \
-    curl -# -L {$JSONLZ4_URL} | tar xz --strip 1 -C jsonlz4 && \
-    curl -# -L {$LZ4_URL} | tar xz --strip 1 -C lz4 && \
-    mv jsonlz4/src/ref_compress/*.c jsonlz4/src/ && \
-    cp lz4/lib/lz4.* jsonlz4/src/ && \
-    cd jsonlz4 && \
-    gcc -static -Wall -o dejsonlz4 src/dejsonlz4.c src/lz4.c && \
-    gcc -static -Wall -o jsonlz4 src/jsonlz4.c src/lz4.c && \
-    strip dejsonlz4 jsonlz4 && \
-    cp -v dejsonlz4 /usr/bin/ && \
-    cp -v jsonlz4 /usr/bin/ && \
-    cd .. && \
-    # Cleanup.
-    del-pkg build-dependencies && \
-    rm -rf /tmp/* /tmp/.[!.]*
-
 # Install Firefox.
 RUN \
 #    add-pkg --repository http://dl-cdn.alpinelinux.org/alpine/edge/main \
diff --git a/rootfs/etc/cont-init.d/55-firefox.sh b/rootfs/etc/cont-init.d/55-firefox.sh
index 936b21c..ddaf322 100755
--- a/rootfs/etc/cont-init.d/55-firefox.sh
+++ b/rootfs/etc/cont-init.d/55-firefox.sh
@@ -23,29 +23,6 @@ fi
 #    env HOME=/config /usr/bin/profile-cleaner f
 #fi
 
-# Fix window display size is session stores.
-if [ -n "$(ls /config/profile/sessionstore-backups/*.jsonlz4 2>/dev/null)" ]; then
-    for FILE in /config/profile/sessionstore-backups/*.jsonlz4; do
-        WORKDIR="$(mktemp -d)"
-
-        dejsonlz4 "$FILE" "$WORKDIR"/json
-        cp "$WORKDIR"/json "$WORKDIR"/json.orig
-
-        sed -i 's/"width":[0-9]\+/"width":'$DISPLAY_WIDTH'/' "$WORKDIR"/json
-        sed -i 's/"height":[0-9]\+/"height":'$DISPLAY_HEIGHT'/' "$WORKDIR"/json
-        sed -i 's/"screenX":[0-9]\+/"screenX":0/' "$WORKDIR"/json
-        sed -i 's/"screenY":[0-9]\+/"screenY":0/' "$WORKDIR"/json
-
-        if ! diff "$WORKDIR"/json "$WORKDIR"/json.orig >/dev/null; then
-            jsonlz4 "$WORKDIR"/json "$WORKDIR"/jsonlz4
-            mv "$WORKDIR"/jsonlz4 "$FILE"
-            echo "fixed display size in $FILE."
-        fi
-
-        rm -r "$WORKDIR"
-    done
-fi
-
 # Initialize log files.
 for LOG_FILE in /config/log/firefox/output.log /config/log/firefox/error.log
 do