I have recently updated to 22.04, which, unlike previous versions, installs Firefox via Snap. My PC is on constantly, and Firefox is usually open.
Every now and then I get a notification telling me that a Firefox update is pending and I should close Firefox. The last time I did that, nothing seemed to happen for several hours until I manually ran sudo snap refresh, which worked fine.
Today I got another update notification. I closed Firefox and immediately ran sudo snap refresh.
However, I am wondering how the devs intended Firefox to be updated – do they really expect users to run snap manually every time they get an update notification? Or should updates happen automatically when the system is rebooted? (And in that case, what about systems which get only infrequent reboots?)
