Better Chromium: install Raspberry Pi Foundation chromium on rpi Ubuntu

suggestion from #2528

apps/Better Chromium/install

@@ -7,6 +7,36 @@ else
   error "User error: Chromium is not installed! Failed to find either a 'chromium' command or 'chromium-browser' command. If you are sure Chromium is installed, please reach out to Botspot for this to be fixed."
 fi
 
+# obtain model
+get_model &>/dev/null
+if [[ "$model" == *"Raspberry Pi"* ]] && [[ "$__os_id" == Ubuntu ]]; then
+  # rpi ubuntu use Pi OS packaged chromium
+  add_external_repo "raspberrypi" "https://archive.raspberrypi.com/debian/raspberrypi.gpg.key" "https://archive.raspberrypi.com/debian" "bookworm" "main" || exit 1
+  # also disable chromium snap apt package from Ubuntu
+  echo 'Package: *
+Pin: release o=Raspberry Pi Foundation
+Pin-Priority: -1
+
+Package: chromium*
+Pin: release o=Raspberry Pi Foundation
+Pin-Priority: 1000
+
+Package: chromium*
+Pin: release o=Ubuntu*
+Pin-Priority: -1' | sudo tee /etc/apt/preferences.d/chromium >/dev/null
+  if package_installed "chromium-browser"; then
+    # install_packages will not switch an already installed 1:1snap* package to a XXX chromium-browser package since this would constitute a downgrade
+    # the pin priorities added above will prevent Ubuntu repository chromium-browser packages from even showing or installing in the future but we still need to do the initial downgrade from 1:1snap* to the ppa version of chromium-browser
+    apt_update
+    apt_lock_wait
+    sudo apt --only-upgrade --allow-downgrades install chromium-browser -y | less_apt
+  else
+    apt_update
+    apt_lock_wait
+    sudo apt install chromium-browser -y | less_apt
+  fi
+fi
+
 #determine where the Chromium customizations folder is.
 if [ -d /etc/chromium.d ];then
   folder=/etc/chromium.d