ESnext is lagging behind though (12% to >30% for Firefox and Chrome)
On the other hand, i18n API support: http://kangax.github.io/compat-table/esintl/ not done yet, but at >90% it's way better than Safari's 50% and most of the failures seem to be accepting values it should throw errors for in i18n API.
On the other hand, i18n API support: http://kangax.github.io/compat-table/esintl/ not done yet, but at >90% it's way better than Safari's 50% and most of the failures seem to be accepting values it should throw errors for in i18n API.