Facebook are known to track you even after you have logged out of your Facebook account. With mobile apps being given permission to access so much information on the devices, is it possible for Facebook or other social networks to track your browsing through the permissions given to the apps? In other words, lets say you have never logged into Facebook on your device and put their cookies on your device, but you have their app. Can their app track you too?
Absolutely. Apps employ ad networks which are shared among different websites that share the same ad network (AdClick as an example). The ad network installs cookie on the system which gets shared between websites you visit and share the same ad network. That is, your unique cookie gets tossed around, which helps track your movement across the web.