Well... As Mac-2 is on the way to repair service, I decided to purge the HD and reinstall the MacOS operating system, altogether. With Mac, its not such a big deal as with Windows. But one only needs to do it in very rare occasions - like now, when I'm testing a heating problem of Mac-2.
After the OS was installed, I downloaded Opera and logged into sync. And now I can see all three devices - Mac-1, Mac-2 and Windows-PC open tabs, bookmarks and speed dial.
I guess we can call this case solved, even though we don't know what caused the problem, initially. Thank you @lecog for your help, and let's carry on from here. Have a great summer and stay healthy!
over and out!
Ok, so let me ask this, instead. I gather, from the lack of any responses and my own searching, that there is no extension that does what I need. So I'm willing to try and do one, myself. There's just one thing I haven't been able to find (or know that I've found it in a list of extensions related to bookmarks): how to basically intercept a user opening a bookmark, whether it be in bookmarks, the bookmarks toolbar, etc., and, using code that I have found, open that bookmark in a new tab? I just need to know how to see that click on any/all bookmark(s) and act on it. Suggestions? Thanks.
Well, just to close this question and topic out it seems that the problem was a combination of operator error and late night confusion over the results. My bad but at least I opened an account here so I can post on forums in the future and figured out how to use Bookmarks better.
@leocg said in Bookmarks | Sharing option:
@zalex108 Opera had it a while ago but the feature was dropped, apparently, for very low usage.
Didn't knew the reason.
We'll see now whether there is community's support.
I'll should ask for a TeamSync's workaround.
Wow, thanks! At least there is rectangle selection (would never have guessed! especially in List view)! But it still doesn't allow me to make several selections (like 1-10 & 15-30 & 37-50, etc), which Shift+Click usually does.
But, again, in History - no selection whatsoever