I never said it was the majority, but if you look at the numbers there's a chunkable size of population that don't change (and it's been higher than the Mozilla market share for many years now), that number is getting bigger now that Edge is not immediately terrible anymore (I know several people who used Chrome and now stick to Edge). Plus we have a history of people keeping the default browser around just in case since gov websites were always optimized for weird setups like "Internet Explorer running Java applets".