diff --git a/.SRCINFO b/.SRCINFO
index f63e2af587aa3..f2294194a280b 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,7 +1,7 @@
 pkgbase = thorium-browser-bin
 	pkgdesc = Chromium fork focused on high performance and security
 	pkgver = 117.0.5938.157
-	pkgrel = 3
+	pkgrel = 4
 	url = https://github.com/Alex313031/Thorium
 	install = thorium-browser.install
 	arch = x86_64
@@ -16,7 +16,7 @@ pkgbase = thorium-browser-bin
 	source = https://github.com/Alex313031/Thorium/releases/download/M117.0.5938.157/thorium-browser_117.0.5938.157_amd64.deb
 	source = thorium-browser.sh
 	sha256sums = SKIP
-	sha256sums = e09c5c523f45b8acfd58403514f9ad69047daa94600787bd7aee33d78080f9a9
+	sha256sums = d2bec392c1dafc6ab4a4cd463be8cf627c58e00960ebea54c54151e9df101f53
 
 pkgname = thorium-browser-bin
 	depends = alsa-lib
diff --git a/PKGBUILD b/PKGBUILD
index 48a2088e6fca7..799a157877ca7 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -19,7 +19,7 @@ fi
 _pkgname="thorium-browser"
 pkgname="$_pkgname-bin"
 pkgver=117.0.5938.157
-pkgrel=3
+pkgrel=4
 pkgdesc="Chromium fork focused on high performance and security"
 url="https://github.com/Alex313031/Thorium"
 license=('BSD')
@@ -65,7 +65,7 @@ source=(
 )
 sha256sums=(
   'SKIP'
-  'e09c5c523f45b8acfd58403514f9ad69047daa94600787bd7aee33d78080f9a9'
+  'd2bec392c1dafc6ab4a4cd463be8cf627c58e00960ebea54c54151e9df101f53'
 )
 
 pkgver() {
diff --git a/thorium-browser.install b/thorium-browser.install
index 37a4860072abb..cca041f4bc787 100644
--- a/thorium-browser.install
+++ b/thorium-browser.install
@@ -1,20 +1,34 @@
 # Colored makepkg-like functions
 msg_blue() {
-    printf "${blue}==>${bold} $1${all_off}\n"
+    printf "${BLUE}==>${BOLD} $1${ALL_OFF}\n"
 }
 
 note() {
-    printf "${blue}==>${yellow} NOTE:${bold} $1${all_off}\n"
+    printf "${BLUE}==>${YELLOW} NOTE:${BOLD} $1${ALL_OFF}\n"
 }
 
-all_off="$(tput sgr0)"
-bold="${all_off}$(tput bold)"
-blue="${bold}$(tput setaf 4)"
-yellow="${bold}$(tput setaf 3)"
+ALL_OFF="$(tput sgr0)"
+BOLD="${ALL_OFF}$(tput bold)"
+BLACK="${BOLD}$(tput setaf 0)"
+RED="${BOLD}$(tput setaf 1)"
+GREEN="${BOLD}$(tput setaf 2)"
+YELLOW="${BOLD}$(tput setaf 3)"
+BLUE="${BOLD}$(tput setaf 4)"
+MAGENTA="${BOLD}$(tput setaf 5)"
+CYAN="${BOLD}$(tput setaf 6)"
+WHITE="${BOLD}$(tput setaf 7)"
 
 post_install() {
-    note "Custom flags should be put directly in: ~/.config/thorium-flags.conf"
-    note "The launcher is called: 'thorium-browser'"
+    if /usr/lib/ld-linux-x86-64.so.2 --help | grep -qsE '^\s+x86-64-v3.*supported.*$' ; then
+        note "Custom flags should be put directly in: ~/.config/thorium-flags.conf"
+        note "The launcher is called: 'thorium-browser'"
+    elif /usr/lib/ld-linux-x86-64.so.2 --help | grep -qsE '^\s+x86-64-v2.*supported.*$' ; then
+        note "Your processor supports x86-64-v2, but not x86-64-v3."
+        note "You may want to install thorium-browser-sse3-bin instead."
+    else
+        note "Your processor does not support x86-64-v2 or x86-64-v3."
+        note "thorium-browser will not work on your computer."
+    fi
 }
 
 post_upgrade() {
diff --git a/thorium-browser.sh b/thorium-browser.sh
index 7af0ede69013e..3bf43a3563887 100644
--- a/thorium-browser.sh
+++ b/thorium-browser.sh
@@ -1,11 +1,31 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
-XDG_CONFIG_HOME=${XDG_CONFIG_HOME:-~/.config}
+# check microprocessor architecture level
+if /usr/lib/ld-linux-x86-64.so.2 --help | grep -qsE '^\s+x86-64-v3.*supported.*$' ; then
+   XDG_CONFIG_HOME=${XDG_CONFIG_HOME:-~/.config}
 
-# Allow users to override command-line options
-if [[ -f $XDG_CONFIG_HOME/thorium-flags.conf ]]; then
-   THORIUM_USER_FLAGS="$(cat $XDG_CONFIG_HOME/thorium-flags.conf)"
+   # Allow users to override command-line options
+   if [[ -f $XDG_CONFIG_HOME/thorium-flags.conf ]]; then
+      THORIUM_USER_FLAGS="$(cat $XDG_CONFIG_HOME/thorium-flags.conf)"
+   fi
+
+   # Launch
+   exec /opt/thorium-browser/thorium-browser $THORIUM_USER_FLAGS "$@"
+elif /usr/lib/ld-linux-x86-64.so.2 --help | grep -qsE '^\s+x86-64-v2.*supported.*$' ; then
+   _message=''
+   _message+=$'Your processor supports x86-64-v2, but not x86-64-v3.\n'
+   _message+=$'You may want to use thorium-browser-sse3-bin.'
+else
+   _message=''
+   _message+=$'Your processor does not support x86-64-v2 or x86-64-v3.\n'
+   _message+=$'thorium-browser will not work on your computer.'
 fi
 
-# Launch
-exec /opt/thorium-browser/thorium-browser $THORIUM_USER_FLAGS "$@"
+# display processor support message
+if tty -s ; then
+   echo "${_message:?}"
+else
+   notify-send -a "thorium-browser" -t 3000 "${_message:?}"
+fi
+
+exit 1