So I assume that backuping "C:\Users\ordic\AppData\Local\Opera Software" is enough for a full restoration of Opera, which is just what I need.
No. Backing up "C:\Users\ordic\AppData\Roaming\Opera Software" is what you want to do. And, if you also want to back up cache, back up "C:\Users\ordic\AppData\Local\Opera Software".
@leocg This feature is not available on Opera GX. As Opera GX already has so many great and innovative features, it would be a shame if this feature was not added to it as 'Opera One' already has this feature.
@leocg Thanks for the reply. I just installed Opera on a new computer and it turns out that I was on a few websites that must have had their links setup that way (open in new tab) which caused me to think it was a general setting. But I later encountered other websites that did not open a new tab for each link. My bad.
Oh, that magnifying glass on the top right dissappeared for me for an unknown reason.
But thanks for the tip with the menu. I didn't noticed this feature was present in menu. It's what I searched for.