Chrome's sync (i.e. sign in to Chrome) uploads the cleartext of your full browsing history to Google by default: http://gregoryszorc.com/blog/2012/04/08/compari

Chrome's sync (i.e. sign in to Chrome) uploads the cleartext of your full browsing history to Google by default: http://gregoryszorc.com/blog/2012/04/08/comparing-the-security-and-privacy-of-browser-syncing/ http://gregoryszorc.com/blog/2012/04/08/comparing-the-securi... From a privacy perspective Chrome and Silk sound the same. Now, maybe Amazon is more actively using that data and doesn't provide means to change privacy settings (Chrome allows you to locally encrypt). I dunno.