Some websites knows that am using adblock and they asking me to disable it and when I do they pop-up a lot of annoying ads and filling my screen with it over and over every time I click anywere on their website page! how did they know that am using adblock? are they spying on my browser add-ons? How do I stop them from spying? or is there anyway to fool them and let them think that i don't have adblock installed?