output help if no parameters sent

scripts/firefox.sh

@@ -0,0 +1,60 @@
+#!/bin/bash
+help() {
+      echo "Usage: $(basename $0) 
+      [-e] Installs Firefox ESR 
+      [-f] Installs Flatpak Firefox
+      [-r] Installs regular Firefox and Pins It's Priority
+      [-p] Purges the Snapd daemon from the system. Use if you don't want snaps anymore period."
+      exit 1
+}
+add_ppa() {
+  sudo add-apt-repository ppa:mozillateam/ppa
+  sudo apt update
+  sudo apt remove firefox
+  sudo snap remove firefox
+  echo 'Unattended-Upgrade::Allowed-Origins:: "LP-PPA-mozillateam:${distro_codename}";' | sudo tee /etc/apt/apt.conf.d/51unattended-upgrades-firefox
+}
+
+if [ -z "$*" ]; then help; fi
+
+#process flags
+while getopts 'efrp:h' opt; do
+  case "$opt" in
+    e)
+      echo "Installing Firefox ESR"
+      add_ppa
+      sudo apt install firefox-esr
+      ;;
+
+    f)
+      echo "Installing Flatpak Firefox"
+      sudo snap remove firefox
+      sudo apt install flatpak
+      flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
+      flatpak install flathub org.mozilla.firefox
+      ;;
+
+    r)
+      echo "Installing Regular Firefox"
+      add_ppa
+      sudo apt install -t 'o=LP-PPA-mozillateam' firefox
+      #Pin Priority
+      echo 'Package: *
+Pin: release o=LP-PPA-mozillateam
+Pin-Priority: 1001
+      ' | sudo tee /etc/apt/preferences.d/mozilla-firefox
+      ;;
+
+    p)
+      echo "Purging snapd..."
+      sudo apt autoremove snapd
+      ;;
+
+    *)
+      help
+      ;;
+  esac
+done
+shift "$(($OPTIND -1))"
+
+