content: How much of your online data can be seen by each of these things? -an open website in a tab  -a logged in account (say faceberg for probably the most intrusive possible)  -cookies left in your browser  -someone sniffing packets on your internet, say for unencrypted and encrypted traffic (does https really do anything or can they read it as plaintext still is what I really mean by unencrypted)  -anything else a site might try I can't think of Cheers!