Why does MBAM Premium trial version classify the BlockSite add-on is a PUP? Is that add-on really harmful or is MBAM being overcautious? I asked MBAM tech support. I got a reply from a joker named Maurice who sent me pages of irrelevant copy-pasted blabber, among other things suggesting that I download and install and run a certain diagnostic tool. That is ludicrous. All I wanted was an answer to a simple question: is the Firefox add-on named BlockSite harmful or not?