kDefaultExtraCustomTabs top-level constant

Implementation

const kDefaultExtraCustomTabs = <String>[
  // ref. https://play.google.com/store/apps/details?id=org.mozilla.firefox
  'org.mozilla.firefox',
  // ref. https://play.google.com/store/apps/details?id=com.microsoft.emmx
  'com.microsoft.emmx',
];