Fakespot by Mozilla, which uses AI to analyze reviews, product info and seller data to identify unreliable ecommerce activity, recently released a back-to-school list that noted a high level of problems with backpacks, earbud headphones and device chargers. A browser extension, the "Fakespot Engine," is said to include dozens of machine-learning models, joined by algorithms, that gather metadata from ecommerce websites including Amazon, Best Buy, Flipkart, Home Depot, Sephora and Walmart. The company will not reveal its methods beyond saying that its AI is trained to "pick up on patterns" that are suggestive of fake content.