I don't think this affects these statistics much. Statcounter numbers are based on pageviews for example, and Firefox hasn't given up on having its own UA yet.

I don't think this affects these statistics much. Statcounter numbers are based on pageviews for example, and Firefox hasn't given up on having its own UA yet. The numbers also align too well with the internal stats to be blanketly ignored https://data.firefox.com/dashboard/user-activity https://data.firefox.com/dashboard/user-activity where MAU is 180,000,000/~5,000,000. That's a different approach to calculating usage share than page views from an internal source and external source that come to about the same number.