Browsers May Reveal Online Activities
From: EFF
EFF UNVEILED RESULTS FROM THE “PANOPTICLICK” BROWSER PRIVACY PROJECT, which demonstrated that more than 8 in 10 people use browsers with unique, trackable signatures. Having a distinct browser signature means your individual movements on the web may be easier to track, and several companies are already selling products that claim to use browser fingerprinting to help websites identify users and their online activities.
For the full white paper “How Unique Is Your Web Browser?”:
https://panopticlick.eff.org/browser-uniqueness.pdf
For more about Panopticlick: