class UserAgent::Browsers::Vivaldi

def platform
  return unless application
  if application.comment[0] =~ /Windows/
    'Windows'
  elsif application.comment.any? { |c| c =~ /CrOS/ }
    'ChromeOS'
  elsif application.comment.any? { |c| c =~ /Android/ }
    'Android'
  else
    application.comment[0]
  end
end