diff --git a/core/tabs/applications-setup/browser-setup.sh b/core/tabs/applications-setup/browser-setup.sh
index 8607fb45..ad6a95f5 100644
--- a/core/tabs/applications-setup/browser-setup.sh
+++ b/core/tabs/applications-setup/browser-setup.sh
@@ -104,9 +104,6 @@ Signed-By: /usr/share/keyrings/librewolf.gpg" | "$ESCALATION_TOOL" tee /etc/apt/
 			curl -fsSL https://rpm.librewolf.net/librewolf-repo.repo | pkexec tee /etc/yum.repos.d/librewolf.repo > /dev/null
 			"$ESCALATION_TOOL" "$PACKAGER" install -y librewolf
 			;;
-		rpm-ostree)
-			rpm-ostree install -y librewolf
-			;;
 		zypper)
 			"$ESCALATION_TOOL" rpm --import https://rpm.librewolf.net/pubkey.gpg
 			"$ESCALATION_TOOL" zypper ar -ef https://rpm.librewolf.net librewolf
diff --git a/core/tabs/applications-setup/setup-flatpak.sh b/core/tabs/applications-setup/setup-flatpak.sh
index c2ee20ea..ef0e04aa 100644
--- a/core/tabs/applications-setup/setup-flatpak.sh
+++ b/core/tabs/applications-setup/setup-flatpak.sh
@@ -34,12 +34,6 @@ setup_flatpak() {
             zypper)
                 "$ESCALATION_TOOL" "$PACKAGER" install -y flatpak
                 ;;
-            yum)
-                "$ESCALATION_TOOL" "$PACKAGER" install -y flatpak
-                ;;
-            xbps-install)
-                "$ESCALATION_TOOL" "$PACKAGER" install -S flatpak
-                ;;
             *)
                 printf "%b\n" "${RED}Unsupported package manager: ""$PACKAGER""${RC}"
                 exit 1
diff --git a/core/tabs/common-script.sh b/core/tabs/common-script.sh
index 3e32647f..25c5a71f 100644
--- a/core/tabs/common-script.sh
+++ b/core/tabs/common-script.sh
@@ -126,7 +126,7 @@ checkDistro() {
 
 checkEnv() {
     checkCommandRequirements 'curl groups sudo'
-    checkPackageManager 'nala apt-get dnf pacman zypper yum xbps-install nix-env'
+    checkPackageManager 'nala apt-get dnf pacman zypper'
     checkCurrentDirectoryWritable
     checkSuperUser
     checkDistro
diff --git a/core/tabs/system-setup/docker-setup.sh b/core/tabs/system-setup/docker-setup.sh
index 5c0ae3e8..69e8ebce 100755
--- a/core/tabs/system-setup/docker-setup.sh
+++ b/core/tabs/system-setup/docker-setup.sh
@@ -23,7 +23,7 @@ choose_installation() {
 install_docker() {
     printf "%b\n" "${YELLOW}Installing Docker...${RC}"
     case "$PACKAGER" in
-        apt-get|nala|yum)
+        apt-get|nala)
             curl -fsSL https://get.docker.com | sh 
             ;;
         zypper)
@@ -46,7 +46,7 @@ install_docker() {
 install_docker_compose() {
     printf "%b\n" "${YELLOW}Installing Docker Compose...${RC}"
     case "$PACKAGER" in
-        apt-get|nala|yum)
+        apt-get|nala)
             "$ESCALATION_TOOL" "$PACKAGER" install -y docker-compose-plugin
             ;;
         zypper)
diff --git a/core/tabs/system-setup/system-update.sh b/core/tabs/system-setup/system-update.sh
index 521fd124..930fd810 100755
--- a/core/tabs/system-setup/system-update.sh
+++ b/core/tabs/system-setup/system-update.sh
@@ -48,13 +48,6 @@ fastUpdate() {
             "$ESCALATION_TOOL" "$PACKAGER" ref
             "$ESCALATION_TOOL" "$PACKAGER" --non-interactive dup
             ;;
-        yum)
-            "$ESCALATION_TOOL" "$PACKAGER" update -y
-            "$ESCALATION_TOOL" "$PACKAGER" upgrade -y
-            ;;
-        xbps-install)
-            "$ESCALATION_TOOL" "$PACKAGER" -Syu-
-            ;;
         *)
             printf "%b\n" "${RED}Unsupported package manager: "$PACKAGER"${RC}"
             exit 1
@@ -65,11 +58,11 @@ fastUpdate() {
 updateSystem() {
     printf "%b\n" "${GREEN}Updating system${RC}"
     case "$PACKAGER" in
-        nala|apt-get)
+        apt-get|nala)
             "$ESCALATION_TOOL" "$PACKAGER" update -y
             "$ESCALATION_TOOL" "$PACKAGER" upgrade -y
             ;;
-        yum|dnf)
+        dnf)
             "$ESCALATION_TOOL" "$PACKAGER" update -y
             "$ESCALATION_TOOL" "$PACKAGER" upgrade -y
             ;;
@@ -81,9 +74,6 @@ updateSystem() {
             "$ESCALATION_TOOL" "$PACKAGER" ref
             "$ESCALATION_TOOL" "$PACKAGER" --non-interactive dup
             ;;
-        xbps-install)
-            "$ESCALATION_TOOL" "$PACKAGER" -Syu
-            ;;
         *)
             printf "%b\n" "${RED}Unsupported package manager: "$PACKAGER"${RC}"
             exit 1