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New technology helps trackers follow consumers' digital imprints — including across devices — through browser settings, battery levels and other details. Mark Airs/Getty Images/Ikon Images hide caption

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Mark Airs/Getty Images/Ikon Images

Online Trackers Follow Our Digital Shadow By 'Fingerprinting' Browsers, Devices

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Crews work a controlled burn in Geneva, Fla., in December. The state's forest service has rolled out a system to track equipment during fires, and hopes it can eventually be used to pinpoint firefighters, too. Joshua C. Cruey/Courtesy of the Orlando Sentinel hide caption

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Joshua C. Cruey/Courtesy of the Orlando Sentinel