I am not in 100% sure, but it looks like when f you brows the web in 'private windows' (should be in sand box) you permanently agree that every script on a web site can run be run without you.
Means you let every script run itself even some of them can be dangerous.
Yes. as you were 100% incapable of reading the original question before answering you were also 100% wrong on your second answer.
Usually I think that people that are unable to coherently read the question or after clarifying it to them still answer wrong should STFU in stead of posting multiple spams.
The option is there for remembering the permissions you set while you are on private browsing mode, because that mode would not save those settings otherwise, as it's not supposed to remember anything about the session.
Been googling about this few hours and this piece of shit was on the top hits...