It would be nice if Okular can support dragging tabs outside of the okular window and make up its own okular window like many browsers.

For me, I like keep Okular documents in the same window so I can easily navigate among documents and don't have to go back to my taskbar. However, sometimes you want to documents to be displayed on each side of the screen, so a tab dragging (to make up its own window) can be extremly handy.

I like this feature, and would like to see it not just for Okular but for other KDE apps with tabbed UIs.
You might propose this over in the Brainstorm forum so people can vote for it and for further discussion.

Thank you for navigating me to the correct forum for feature suggestions. I have posted it at https://forum.kde.org/viewtopic.php?f=83&t=138726. Please do vote for it!

Cheers,
Kun