Simulation = For analysis and study Emulation = For usage as a substitute A simulator is an environment which models but an emulator is one that replicates the usage as on the original device or system. Simulator mimics the activity of something that it is simulating. It “appears”(a lot can go with this “appears”, depending on the context) to be the same as the thing being simulated. For example the flight simulator “appears” to be a real flight to the user, although it does transport you from one place to another. Emulator, on the other hand, actually “does“ what the thing being emulated does, and in doing so it too “appears to be doing the same thing“. An emulator may[…]

They found a way to track users activities online with finger printing, but We got noScript add on in firefox and I think they r forgetting. more over here What is it? read over here