That shouldn't be hard to implement, depending on the method it was chosen, a simple browser restart could be enough. Or a dedicated button as well. Sorry, I don't have personal experience with any of above, so it is up to developers to add it if they see this urgent or not. But, the main reason I don't like them much is that users are usually directly intimidated by them, feeling that someone is tracking them (yes, of course, but not in such exposed way). They are useful, but have their other side which you cannot easily explain to an ordinary user/visitor.
