5         chrome? || firefox? || safari? || edge? || ie?(">8") || generic_webkit?
 
   9         chrome? || firefox? || safari? || edge? || ie?(">8") || generic_webkit?
 
  13         chrome?(">44") || firefox?(">24") || safari?(">7") || edge?(">11") || generic_webkit?
 
  17         webkit? && !chrome? && !safari? && !edge? && !phantom_js?
 
  23 Browser::Base.include(OpenStreetMap::Browser::Features)