Best regards. Opera.
I think that would be amazing to put in motion browser tabs, is very useful, because when I'm browsing. And I'm doing a job, I can also be watching a video, but without being in the tab.
It is something like multifunctional.
And I would also like to add a different icon when I open a new incognito browser window. It would also be interesting to implement that option, since the issue is more noticeable browser different and more didactic.
Thanks Opera

Has it all.
Speed, extensions, ad blocking, quick start.

BUT...
I'd like to see changing tab preview moving. And to create a private window, you see a different icon. As hidden.

Perfect team OPERA!