> One of the most persistent misunderstandings about Safe Browsing is the idea that the browser needs to send all visited URLs to Google in order to verify whether or not they are safe.
> While this was an option in version 1 of the Safe Browsing protocol (as disclosed in their privacy policy at the time), support for this "enhanced mode" was removed in Firefox 3 and the version 1 server was decommissioned in late 2011 in favor of version 2 of the Safe Browsing API which doesn't offer this type of real-time lookup.
