I tried this a few months ago with the same results, but I just tried again today.
When I installed Opera 60, on a system that has Chrome installed, as well as other browsers, it automatically made itself the default browser without asking, it brought in all my bookmarks without asking, my logins and passwords without asking, and it pinned itself to my Win 10 taskbar without asking. On top of that, for the last one, even when I "unpin" it from the taskbar, it still has a blank spot where the icon was (new programs I open even skip over it leaving a blank), and if I right-click, it gives me the option to pin it to my taskbar, despite the fact I specifically already asked it to NOT be pinned to my taskbar. Even "Close all windows" does nothing. I can't even get rid of that one, since it's not even listed as running in my task manager. If I do pin and unpin another instance? it makes the whole thing stay there, but be completely uninteractive.
Hey, all of this stuff is fine if people want to allow it, but how is it acceptable for all of this to happen without any permissions granted, or at least permissions that may be hidden in in some EULA or setting that is not available when you install.
Who is OK with this?