This is really odd. Occasionally when I open a torrent file, instead of Transmission (default) opening, Opera opens the torrent. How can that be? I don't have Opera. I've never installed Opera. I never thought about installing Opera. The crazy thing about it is it works (it loads up websites) but when I search for it in AppCleaner and in Spotlight, it's nowhere to be found. How is that possible? How can a program that I never installed be working on my computer?