Opera is a browser and a company not to be trusted IMO. Never do mission-critical work with this sketchy software. I've given Opera plenty of chances and its always flaked out on me in the weirdest ways.
This browser also had the habit of mysteriously becoming my default browser without me actually doing it. That's when I could no longer even allow it to be installed on my system.
Sorry to be a wet blanket, but I had to share this in case anyone wants a different perspective.