You might want to browse in incognito mode, while visiting these sites, so it doesn't save your browser history and cookies after you close the browser. You might also want to install AdBlock/AdBlock+, and use a browser which attempts to block, at least some, adverts automatically.
Speaking about phones spying on you - I downloaded an app for my phone and a part of it tells me about cooling the CPU temperature. Through this app, you can choose or decline to download other apps which are related to or accompany it. One is in regards to the different sensors on the phone. The first app tells me about cooling the CPU, but in the sensor list in an accompanying app, that says there isn't a temperature sensor, at the same time. So either there is a temperature sensor or there isn't, or the CPU temperature is different than the temperature sensor.
Either way, the other sensors on my phone, as according to this accompanying/second app, which has nine in total in its list, are:
-accelerometer;
-light;
-orientation;
-proximity;
-pressure;
-gyroscope;
-sound;
-magnetic; and
-temperature
As I said, it says there isn't a temperature sensor on my phone, despite telling me about the CPU temperature.
In screenshots from the app's help notes, the following links are explanations of those items in the list above.
http://i.imgur.com/DIzaY6R.jpg
http://i.imgur.com/fpNXSkk.jpg
http://i.imgur.com/0Jp7c0G.jpg
http://i.imgur.com/9VhDgT1.jpg
Of course, I knew about some of these things, such as the mic for sound, and the gyroscope/orientation, but I was rather interested as to why it's supposed to need these other sensors, as well. How much do you know about your phone - and more importantly and perhaps unpleasantly and worryingly, how much does your phone know about you - and how much of that is it transmitting to companies/agencies?! Don't forget about Big Data/data mining.
