On Thu, 2011-05-19 at 17:50 +0900, Misha Shnurapet wrote: > * blocked third-party cookies while online (may prevent advertisement > networks from carrying information between sites) I don't think it quite does what people hope. Well, not any more. Third party cookies are cookies that don't belong to the content being loaded. Most tracking cookies are associated with graphics, rather than the page, but either can be used for tracking you. And as far as those graphics are concerned, ownership of their cookies is *NOT* the page you're looking at, but the content going into the page. e.g. As a theoretical example, you might load www.example.com, its page includes images from doubleclick.com, and these images have cookies. If those images include cookies for doubleclick.com, they're not third-party, so they're not blocked. But if those images included cookies to some other domain, such as google.com, then they would be third party (or vice versa - images from google, with cookies for doubleclick). So, if you want to block doubleclick.com cookies, for instance, you need to directly blacklist them. This has been my experience, at least. I think most people's ideas about third-party cookies, and apparently the browser authors, would be along these lines: You'd browse www.example.com, it'd include pages and graphics from itself, but the tracking cookies would be for someone like doubleclick.com (this *is* a third party). Going back to my first example, simply blocking doubleclick.com cookies wouldn't be enough to stop them tracking you. The mere loading of their graphics has counted you, and put your IP into their database to track for the rest of your browsing session. You need to stop loading their graphics, in the first place. -- [tim@localhost ~]$ uname -r 2.6.27.25-78.2.56.fc9.i686 Don't send private replies to my address, the mailbox is ignored. I read messages from the public lists. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
