In Ubuntu 21.04 if update through the gnome software store by clicking its popup it restarts your computer just like Windows update even for small updates like Firefox. I disabled automatic update and automatic update notification from the gnome software store and just set my preferences in good old Software&updates and no more annoying restarting. But not sure what happens to snap apps (I don't have any) This is very annoying behaviour for new users, seems like yet another brilliant idea from the gnome crew.
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