const browsers = [
  'last 1 Chrome versions',
  'last 1 Firefox versions',
  'last 1 Safari versions'
];

const isCI = !!process.env.CI;
const isProduction = process.env.EMBER_ENV === 'production';

if (isCI || isProduction) {
  browsers.push('ie 11');
}

module.exports = {
  browsers
};

@@ -1,12 +1,27 @@
+'use strict';%0A%0A
 const browse

Add 'use strict' from 3.1.0-beta.1