v0.2.0

Changed

• The language of locale="auto" is the real Firefox of the egress
  country, by share. Through invisible-core 36.33.0 (the required version
  is exact, as before). A country used to map to one country tag (de-DE)
  that no Firefox build has, so a German egress sent de-DE,de;q=0.9,...
  where a German Firefox sends de,en-US;q=0.9,en;q=0.8, and every session
  of a country spoke the same language. Now each country carries the Firefox
  builds people there run and their share, from Mozilla's Firefox Public
  Data Report (Belgium: French 40%, Dutch 31%, US English 22%), and the egress
  IP picks one: the same address always gets the same language, and the
  addresses of a country spread over its builds as measured.
• An explicit locale is navigator.language. locale="en-AU" reports
  en-AU, en-US, en (it reported en-US, en), and "fr-FR" reports
  fr-FR, fr, en-US, en (it reported fr first): the requested tag goes
  first and Firefox's own table gives the tail.