diff --git a/src/ubuntu/install/firefox/install_firefox.sh b/src/ubuntu/install/firefox/install_firefox.sh
index a1adabf..10d63be 100644
--- a/src/ubuntu/install/firefox/install_firefox.sh
+++ b/src/ubuntu/install/firefox/install_firefox.sh
@@ -152,10 +152,21 @@ pref("browser.aboutwelcome.enabled", false);
 EOF
 fi
 
+# Firefox 147+ introduced XDG base dir support, so profile paths will vary and need to be handled appropriately
+FIREFOX_VERSION=$(firefox --version | awk '{print $3}')
+FIREFOX_MAJOR=$(echo "$FIREFOX_VERSION" | cut -d. -f1)
+if [ "${FIREFOX_MAJOR:-0}" -ge 147 ]; then
+  FIREFOX_PROFILE_BASE="$HOME/.config/mozilla/firefox"
+else
+  FIREFOX_PROFILE_BASE="$HOME/.mozilla/firefox"
+fi
+FIREFOX_PROFILE_PATH="$FIREFOX_PROFILE_BASE/kasm"
+FIREFOX_PROFILES_INI="$FIREFOX_PROFILE_BASE/profiles.ini"
+
 if [[ "${DISTRO}" == @(oracle8|rockylinux9|rockylinux8|oracle9|rhel9|almalinux9|almalinux8|opensuse|fedora39|fedora40|fedora41) ]]; then
   # Creating a default profile
   chown -R root:root $HOME
-  firefox -headless -CreateProfile "kasm $HOME/.mozilla/firefox/kasm"
+  firefox -headless -CreateProfile "kasm $FIREFOX_PROFILE_PATH"
   # Generate a certdb to be detected on squid start
   HOME=/root firefox --headless &
   mkdir -p /root/.mozilla
@@ -168,23 +179,24 @@ if [[ "${DISTRO}" == @(oracle8|rockylinux9|rockylinux8|oracle9|rhel9|almalinux9|
   sleep 2
   kill $(pgrep firefox)
   CERTDIR=$(dirname ${CERTDB})
-  mv ${CERTDB} $HOME/.mozilla/firefox/kasm/
+  mv ${CERTDB} $FIREFOX_PROFILE_PATH/
   rm -Rf /root/.mozilla
 else
   # Creating Default Profile
   chown -R 0:0 $HOME
-  firefox -headless -CreateProfile "kasm $HOME/.mozilla/firefox/kasm"
+  firefox -headless -CreateProfile "kasm $FIREFOX_PROFILE_PATH"
 fi
 
 # Silence Firefox security nag "Some of Firefox's features may offer less protection on your current operating system".
-echo 'user_pref("security.sandbox.warn_unprivileged_namespaces", false);' > $HOME/.mozilla/firefox/kasm/user.js
-chown 1000:1000 $HOME/.mozilla/firefox/kasm/user.js
+mkdir -p "$FIREFOX_PROFILE_PATH"
+echo 'user_pref("security.sandbox.warn_unprivileged_namespaces", false);' > "$FIREFOX_PROFILE_PATH/user.js"
+chown 1000:1000 "$FIREFOX_PROFILE_PATH/user.js"
 
 # configure smartcard support
 # note: some firefox versions don't read from the global pkcs11.txt when creating profiles
 if [[ ${KASM_SVC_SMARTCARD:-1} == 1 ]] && [ -f "$HOME/.pki/nssdb/pkcs11.txt" ]; then
-    cp $HOME/.pki/nssdb/pkcs11.txt $HOME/.mozilla/firefox/kasm/pkcs11.txt
-    chown 1000:1000 $HOME/.mozilla/firefox/kasm/pkcs11.txt
+    cp "$HOME/.pki/nssdb/pkcs11.txt" "$FIREFOX_PROFILE_PATH/pkcs11.txt"
+    chown 1000:1000 "$FIREFOX_PROFILE_PATH/pkcs11.txt"
 fi
 
 if [[ "${DISTRO}" == @(oracle8|rockylinux9|rockylinux8|oracle9|rhel9|almalinux9|almalinux8|opensuse|fedora39|fedora40|fedora41) ]]; then
@@ -195,33 +207,33 @@ fi
 #   based off the installation path. Because that path will be static for our deployments we can assume the hash
 #   and thus assign our profile to the default for the installation
 if grep -q "ID=kali" /etc/os-release; then
-cat >>$HOME/.mozilla/firefox/profiles.ini <<EOL
+cat >>$FIREFOX_PROFILES_INI <<EOL
 [Install3B6073811A6ABF12]
 Default=kasm
 Locked=1
 EOL
 elif grep -q "ID=debian" /etc/os-release || grep -q "ID=parrot" /etc/os-release; then
   if [ "${ARCH}" != "amd64" ]; then
-    cat >>$HOME/.mozilla/firefox/profiles.ini <<EOL
+    cat >>$FIREFOX_PROFILES_INI <<EOL
 [Install3B6073811A6ABF12]
 Default=kasm
 Locked=1
 EOL
   else
-    cat >>$HOME/.mozilla/firefox/profiles.ini <<EOL
+    cat >>$FIREFOX_PROFILES_INI <<EOL
   [Install4F96D1932A9F858E]
   Default=kasm
   Locked=1
 EOL
   fi
 elif [[ "${DISTRO}" != @(oracle8|rockylinux9|rockylinux8|oracle9|rhel9|almalinux9|almalinux8|opensuse|fedora39|fedora40|fedora41) ]]; then
-cat >>$HOME/.mozilla/firefox/profiles.ini <<EOL
+cat >>$FIREFOX_PROFILES_INI <<EOL
 [Install4F96D1932A9F858E]
 Default=kasm
 Locked=1
 EOL
 elif [[ "${DISTRO}" == @(oracle8|rockylinux9|rockylinux8|oracle9|rhel9|almalinux9|almalinux8|opensuse|fedora39|fedora40|fedora41) ]]; then
-cat >>$HOME/.mozilla/firefox/profiles.ini <<EOL
+cat >>$FIREFOX_PROFILES_INI <<EOL
 [Install11457493C5A56847]
 Default=kasm
 Locked=1
@@ -239,5 +251,9 @@ find /usr/share/ -name "icon-theme.cache" -exec rm -f {} \;
 if [ -f $HOME/Desktop/firefox.desktop ]; then
   chmod +x $HOME/Desktop/firefox.desktop
 fi
-chown -R 1000:1000 $HOME/.mozilla
-
+if [ -d "$HOME/.mozilla" ]; then
+  chown -R 1000:1000 "$HOME/.mozilla"
+fi
+if [ -d "$HOME/.config/mozilla" ]; then
+  chown -R 1000:1000 "$HOME/.config/mozilla"
+fi