Spotted on Mozilla’s bug tracker:

[meta] Homepage Sports Widget

Where it turns out the countdown widget was part of a broader plan to add a different permanent widget:

  • “Phase 1: Countdown”
  • “Phase 2: Follow a team and View Schedule”

Web calls will apparently be providing

  • SportsMatch
  • SportsTeam
  • MatchStatus
  • TournamentPhase

You can also expect a popup on the Desktop that advertises World Cup wallpapers.