A few days ago I noticed that every time I copy pasted a url from my Google search results it added some new google gibrish to the url. So I did a bit of research on this and it turns out google has a new option where it tracks your searches for you. To disable this you need to go to google.com and on the top right hand corner click on Search History and then on Pause. [Link]
Finally, there is a new option in Gmail where you can change your “From:” email address. Click on Settings then Accounts.