diff --git a/lib-core.sh b/lib-core.sh
index e7fa2b1..328b31a 100755
--- a/lib-core.sh
+++ b/lib-core.sh
@@ -196,7 +196,7 @@ has_command() {
 }
 
 has_flatpak_app() {
-  flatpak list --columns=application 2> /dev/null | grep "${1}" || return 1
+  flatpak list --columns=application 2> /dev/null | grep "${1}" &> /dev/null || return 1
 }
 
 is_my_distro() {
diff --git a/lib-install.sh b/lib-install.sh
index 0dc2b2d..85e982d 100755
--- a/lib-install.sh
+++ b/lib-install.sh
@@ -433,6 +433,8 @@ revert_gdm_theme() {
 ###############################################################################
 
 install_firefox_theme() {
+  #TODO: add support for Snap
+
   if has_flatpak_app org.mozilla.firefox; then
     local TARGET_DIR="${FIREFOX_FLATPAK_THEME_DIR}"
   else