Ember.AutoLocation Namespace packages/ember-routing/lib/location/auto_location.js:25

Ember.AutoLocation will select the best location option based off browser support with the priority order: history, hash, none.

Clean pushState paths accessed by hashchange-only browsers will be redirected to the hash-equivalent and vice versa so future transitions are consistent.

Keep in mind that since some of your users will use HistoryLocation, your server must serve the Ember app at all the routes you define.