@myswtest Lucky you, linuxoid
I' have found a compromise workaround. Left side bar. It's enabling in Opera View menu.
With this side bar it's easy to drag the window. Although it doesn't look traditional.

@jceaser I tried to find the solution for so many times since I hate it too. A man who had that idea is very bad
I agree, someone may want to save a screen space. But what about others who don't? Make proper setting for them.

Hi. First of all let me express big gratitude for the best browser ever (I use it for about 20 years already).
There is only one issue appeared quite long ago in fact and I still can't get rid of it.
Missing titlebar. Without it it's so hard to drag Opera window with a mouse.

I couldn't find any related setting even with the help of google.