@leocg Thank you.

It would be great if Opera did not change the default.

In case anyone else is having this issue, this article helped me.

I recently installed Opera as a secondary browser on my Macbook, but when I went to YouTube and tried to email a video using the "share" button below the video, I was directed that Opera would open.

I looked in my settings and Opera is not my default browser. Looking online I cannot find a solution for this, but it could be that I don't know what to ask.

Does anyone have a solution?