diff --git a/build-cinnamon.sh b/build-cinnamon.sh
index 0f2fedb..772423b 100755
--- a/build-cinnamon.sh
+++ b/build-cinnamon.sh
@@ -39,6 +39,7 @@ CSBROOT=$(pwd)
 # Loop for all packages
 for dir in \
   gnome-common \
+  mozjs \
   cjs \
   cinnamon-desktop \
   json-glib \
diff --git a/mozjs/mozjs.SlackBuild b/mozjs/mozjs.SlackBuild
new file mode 100644
index 0000000..f97ff21
--- /dev/null
+++ b/mozjs/mozjs.SlackBuild
@@ -0,0 +1,104 @@
+#!/bin/sh
+
+# Slackware build script for mozjs
+
+# Copyright 2015 Willy Sudiarto Raharjo <willysr@slackware-id.org>
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+PRGNAM=mozjs
+VERSION=${VERSION:-24.2.0}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_csb}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i486 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+wget -c https://ftp.mozilla.org/pub/mozilla.org/js/$PRGNAM-$VERSION.tar.bz2
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/csb}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i486" ]; then
+  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+tar xvf $CWD/$PRGNAM-$VERSION.tar.bz2
+cd $PRGNAM-$VERSION/js/src
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+CFLAGS="$SLKCFLAGS" \
+CXXFLAGS="$SLKCFLAGS" \
+./configure \
+  --prefix=/usr \
+  --libdir=/usr/lib${LIBDIRSUFFIX} \
+  --sysconfdir=/etc \
+  --localstatedir=/var \
+  --mandir=/usr/man \
+  --disable-tests \
+  --enable-install-strip \
+  --build=$ARCH-slackware-linux
+
+make
+make install DESTDIR=$PKG
+
+find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+
+cd ../..
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a INSTALL LICENSE README $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+find $PKG/usr/doc/$PRGNAM-$VERSION/ -type f -exec chmod 644 {} \;
+chown -R root:root $PKG/usr/doc/$PRGNAM-$VERSION
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-txz}
diff --git a/mozjs/slack-desc b/mozjs/slack-desc
new file mode 100644
index 0000000..ac5233f
--- /dev/null
+++ b/mozjs/slack-desc
@@ -0,0 +1,12 @@
+     |-----handy-ruler------------------------------------------------------|
+mozjs: mozjs (JS Binding)
+mozjs:
+mozjs: SpiderMonkey is Mozilla's JavaScript engine written in C/C++.
+mozjs: It is used in various Mozilla products, including Firefox, and
+mozjs:  is available under the MPL2.
+mozjs:
+mozjs:
+mozjs:
+mozjs:
+mozjs:
+mozjs: