Another point here is Amazon Silk caches/records a huge amount of your browsing, it's between the user and the web, and so does Opera Mobile (not opera desktop

Another point here is Amazon Silk caches/records a huge amount of your browsing, it's between the user and the web, and so does Opera Mobile (not opera desktop as far as I know). Facebook in this way will capture even more than they do through their ubiquitous "like" buttons which are constantly recording where everyone goes.