When Opera completes downloading a file, this pop-up appears. The issue is it unfocuses the website you're currently on. You have to click away or press Esc to focus back on the website. It may look like a single step but I download files back to back and I have to do that single step every time. It is really annoying!
I've been through many old posts who wants this to be resolved or be a feature. But I had no luck finding a way to disable it. I would be completely fine if there was an extension I could download to fix my issue.