@bollingg said in How Do I Keep Opera One From Installing?:
Thank you for your speedy reply. I just got a Ubuntu laptop and have never done anything Linux yet. I have to learn how to use DM. Thanks again.
Just to be clear:
I use DM to refer to the graphical environment you've chosen.
As I mentioned, I'm using the "KDE Plasma" desktop environment.
You might be using GNOME desktop environment (typically default for Ubuntu). So, you can modify the Opera icon to change its settings as I've shown. Normally, you would right-click on the icon and select (something like) "Edit Application settings"