When I am in full screen in Mac High Sierra and hit CMD + N, a new windows seems to be opening and shifting to left pane. But when I try to open the new opened windows they appear nowhere. I can see the details about the windows are now open, but they are disappeared. I can find them no where on the screen. I have tried with two screens too but they don't appear anywhere.
Here are some screenshots for better understanding.
There are two new windows (Speed Dials) seems to be opened somewhere.
Version of Opera?
Sorry for the late reply, I was using one version older than current version 48.0.2685.50.
Now everything seems smoothly working. Thanks