@mgeffro Thank you for providing the explanation. However, I am still not happy with enforced permissions. I would rather have the pop up and the choice to choose and to remove Google any time I wish. Period.
I was referring to the Opera account indeed, which can be in the Browser, on the website, etc. all being handled by the same authentication layer. A mobile sms confirmation code for unrecognized devices would be a good start.
That's his question - why doesn't Android have it?
Keep in mind though, "Do not track" is almost meaningless. The website gets decide what it will do if it sees a "Do not track" header, and many just ignore it.