Another standard feature that Opera is missing is printing rich text in a selection.
In this situation, Opera only prints text. (Notice how even images aren't highlighted in the selection range.)
And, because of some nasty regressions that were never fixed, Opera can't even print the text that it does print with white-space formatted properly.
This all makes Opera a no-go if you value printing.
Other browsers are years (won't be long before it's a decade) ahead of Opera in this area. Opera is only about as advanced as Netscape Navigator 4.78 in this area.