Volks,
You might find it interesting to listen to this TED talk by the CEO
of Mozilla, then get the plugin called Collusion for either Firefox
or Chrome (the Chrome one is a released product and gives more
information, the Firefox is still in 0.x release.  Both are free.) to
get an idea of how your own web behavior is being disseminated and
sold commercially; and possibly make some decisions based on that.

And while we're on the subject, www.duckduckgo.com is a search engine
that is not interested in your behavior and that returns the same
search results no matter who or where is asking.  I use it first and
shift to another if I don't get answers there.

Yours,
David