Many users are quite concerned by the amount of tracking performed online so they dump their browser’s cache and cookies quite regularly. Effective privacy perserving strategy or not, all browsers thus have a commonly used setting to dump various browsing droppings like cookies, browser history, and cached files when the browser is closed. When looking at Internet Explorer 8 version of this recently we noticed that a subtle and likely overlooked aspect of the dialog – a privacy purge exception for favorited sites.
It appears that Microsoft has made an interesting assumption, end users are ok with preserving their tracks with bookmarked “friends,” but certainly not various sites they may occasionally visit. I guess the idea here is that because you have favorited the site you have committed to a more long term relationship and thus saving a cookie for easy login or cached files for fast render is ok? Seems a bit suspect to us, at least Redmond could have started with an opt-in for this rather an than opt-out.