OK, problem is solved for me.
I opened Opera, windows setting panel showed up, like always.
I change default browser to Edge and default mail program to Mail.
Then I closed Opera, opened it again and setting panel did not showed up!
So I closed Opera, opened Windows setting by myself and changed Opera to my default browser.
And everything works.
I'm quite sure I tried this before, so maybe some magic is involved.
I hope I helped somebody.
I am also facing the same issue! But when Opera is configured in "Opera Turbo" mode then I am able to see videos on Dailymotion..
If this setting is disables then dailymotion website doesn't load at all! Why is this happening?
My Opera beta version is : 27.0.1689.33
I didn't try opening multiple links in one tab, so don't know. There is a Chrome extension, One Tab
https://chrome.google.com/webstore/detail/onetab/chphlpgkkbolifaimnlloiipkdnihall?hl=en (Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.)
Maybe it is something similar to that.
On the opening links with the short labels, that might could well be good for use with Voice Recognition software. You just say the label-letters and the link should open.
The vision behind Opera 15 and beyond
How can Opera beat Chrome? Do you think, Opera Software has an ace up its sleeve?
Not a long time ago I posted a comparison between the two. I think that there are enough differences to attract many kinds of users.