If you are concerned about the ´behind the scenes´ of your Internet access, you may apply the following changes on your network:
– use DNS servers that block sites hosting malware, phishing schemes, and scams:
guidelines for using alternative DNS servers can be found on WikiLeaks
a list of Free & Public DNS Servers is published by about.com
– install tools to detect and protect against web page trackers (scripts, pixels, and other elements):
here is a list of Browser Extensions that Protect Your Privacy
use Ghostery to control page trackers
Check your pc or mac for IP leaks and see what your give away on information: IP/DNS Detection.