GoKawiilMozilla study of 25 million Firefox users cuts fingerprint uniqueness from 75% to 46%
Mozilla, working with researchers from the University of Toronto and UC San Diego, measured browser fingerprinting uniqueness across nearly 25 million Firefox release users using privacy-preserving collection methods including OHTTP. The findings informed new anti-fingerprinting protections shipped in Firefox 143, which the study says reduced the share of users identifiable as unique by commercial fingerprinting tools from 75% to 46%. Mozilla has published the paper, an appendix, aggregate data, analysis code, and an interactive tool letting users compare their own browser against the measured population.