@ajaxstardust Chromium should work.
Is this to suggest that Opera users should switch to Chromium, since it should work; Chromium is the only properly documented browser of its type?
The point (by now) is less about understanding the software commands. I lose confidence in the whole (the software, the community, etc.) when I'm advised to reference Chromium.
The software in question is Opera. I'd prefer to be a proper Opera user. Where is the Opera documentation? A simple page to indicate that there is none would be better than spending time doing the research only to find a few bits here and there about how to open a new tab. I'm sure I didn't submit enough queries and likely omitted the most sensible keywords in those that I did. I didn't do the necessary research.
I trust your advice regarding the commands. I'll have a look. Thank you. I apologize for my outburst, and my poor attitude. I shouldn't participate in forums. I'm old, and I don't like the way things have turned out. It's no one's fault that I feel this way. It's the degenerative nature and aging. I'm sure there's a couple of Pink Floyd songs about it, or other expressions likewise.