@ServiceLikes Thanks very much!

This has only just appeared in last day or so. It does not show up in a screen shot so I photographed it. It blocks my access to any controls in top left of screen. I have to reduce size of window to get at those controls.

It has emojis across the top, + Sign, - 2nd row 'Speed Dial - 3rd row opera://startpageshared.
There is no effect from clicking any of these things.
BTW I have no way to find out my version of Opera.