"Ubuntu" uses "Snap" for "Firefox" by default since 22.04 which has this annoying "pop-up" warning every other day. I wrote the following script to aid upgrading of "Snap" apps.
#!/bin/bash
sudo killall firefox
sudo snap refresh
echo -e "\nIf specific Snap app is still pending update, please use the following commands.\nsudo snap refresh <appname>\nkill <pid>\nsudo snap refresh"
