This thread confirms my major hesitation in using Opera as my primary browser (at present, I only use it for sites that don't want to "play nice" with Firefox), which is unfortunate because the update of the latter on Thursday night has caused a major problem for me ... notably, all sites are taking at least twice as long to load. I was considering using Opera for everything because I am not experiencing the same slowdown.
But one of the things that Firefox does is provide better download management. I need to have it configurable to ask before downloading, to give me "open instead of save" options for certain file types (and what I want those opened with) in the "ask" box, and not default to everything going to a single folder. Firefox even manages to remember where the last download from a particular site was saved and offer that as the destination folder, including the ability to change same.
Until Opera has that kind of functionality, its usefulness is limited to me. So I would like to add my vote to those who believe this should be part of Opera.
(And please, no comments about "the Chromium engine". I know this, consider that to be a failing as well and the reason why I do not use browsers built on that engine. If Opera's developers are as talented as I am led to believe, they can find a way to do this.)