“Once Firefox slips below the 2% threshold in the government’s visitor analytics, USWDS tells government web devs they don’t have to support Firefox anymore.”
US government sites show Firefox at 2.2% of traffic over the last 90 days. Mozilla’s own count of active clients fell from 244.2 million at the end of 2018 to 187.3 million in November 2023. Corporate IT shops copy the government because dropping a browser means less testing. Two tenths of a point stand between Firefox and the same exit Internet Explorer took.