class Browser::Base

def modern?

Return true if browser is modern (Webkit, Firefox 17+, IE9+, Opera 12+). 
def modern?
  warn <<~TEXT
    Browser::Base#modern? is now deprecated.
    Check https://github.com/fnando/browser/issues/435 for details.
  TEXT
  Browser.modern_rules.any? {|rule| rule === self } # rubocop:disable Style/CaseEquality
end