Modern browsers now apply rel="noopener" behavior automatically to links when target="_blank" is present. However, according to the MDN browser compatability table, Opera still does not do this.
This seems very strange to me, as Opera is based on Chromium, and I would have thought that this sort of update would have been made to Chromium, rather than the proprietary Chrome wrapping around it. Can anyone confirm that Opera DOES NOT apply noopener behavior to target="_blank" automatically? (And even better, why not?)