--- a/seamonkey.SlackBuild	2021-08-26 20:47:34.623405128 +0000
+++ b/seamonkey.SlackBuild	2021-08-29 05:49:21.249222315 +0000
@@ -65,6 +65,14 @@
   LIBDIRSUFFIX="64"
   OPTIMIZE_FLAG=${OPTIMIZE_FLAG:-"-O1 -g0"}
   ELFHACK="--enable-elf-hack"
+elif [ "$ARCH" = "aarch64" ]; then
+  LIBDIRSUFFIX="64"
+  OPTIMIZE_FLAG=${OPTIMIZE_FLAG:-"-O1 -g0"}
+  ELFHACK=""
+elif [ "$ARCH" = "riscv64" ]; then
+  LIBDIRSUFFIX="64"
+  OPTIMIZE_FLAG=${OPTIMIZE_FLAG:-"-O1 -g0"}
+  ELFHACK=""
 else
   LIBDIRSUFFIX=""
   OPTIMIZE_FLAG=${OPTIMIZE_FLAG:-"-O1 -g0"}
@@ -93,6 +101,11 @@
 # Set linker to use:
 LINKER=bfd
 
+# Keep memory usage as low as possible when linking:
+SLKLDFLAGS=" -Wl,--as-needed -Wl,--no-keep-memory -Wl,--stats"
+export LDFLAGS="$SLKLDFLAGS"
+export MOZ_LINK_FLAGS="$SLKLDFLAGS"
+
 NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}
 
 TMP=${TMP:-/tmp}
@@ -143,6 +156,16 @@
 OPTIONS="\
   --prefix=/usr \
   --libdir=/usr/lib${LIBDIRSUFFIX} \
+  \
+  --with-system-libvpx \
+  --with-system-nss \
+  --with-system-icu \
+  --enable-system-ffi \
+  --enable-system-pixman \
+  --with-system-bz2 \
+  --with-system-jpeg \
+  --disable-webrtc \
+  \
   --enable-cpp-rtti \
   --enable-default-toolkit=cairo-gtk3 \
   --enable-startup-notification \
@@ -170,7 +193,8 @@
   --with-unsigned-addon-scopes=app,system \
   --enable-application=comm/suite \
   --host=$ARCH-slackware-linux \
-  --target=$ARCH-slackware-linux"
+  --target=$ARCH-slackware-linux \
+  "
 
 export BUILD_OFFICIAL=1
 export MOZILLA_OFFICIAL=1