.jshintrc

{
  "predef": {
    ...
    "Bugsnag": true,
    ...
  },
  ...
}

bower.json

{
  ...
  "dependencies": {
    ...
    "bugsnag": "~2.4.7"
  }
  
}

Brocfile.js

...

var app = new EmberApp({
  ...
  sourcemaps: {
    "enabled": true,
    "extensions": ["js"]
  }
});

app.import('bower_components/bugsnag/src/bugsnag.js');

...

bugsnag.js

import Ember from 'ember';
import config from '../config/environment';

export default {
  name: 'bugsnag',
  after: 'authentication',

  initialize: function(container) {
    var appController = container.lookup('controller:application');

    Bugsnag.apiKey = config.APP.BUGSNAG.API_KEY;
    Bugsnag.releaseStage = config.environment;
    Bugsnag.notifyReleaseStages = ["staging", "production"];

    // Routing errors and edge cases
    Ember.onerror = function(error) {
      Bugsnag.context = appController.get('currentPath');
      Bugsnag.notifyException(error);
    };

    // Errors that occur in Promises
    Ember.RSVP.on('error', function (error) {
      Bugsnag.context = appController.get('currentPath');
      Bugsnag.notifyException(error);
    });

  }
};