ReferenceError: Can't find variable: indexedDB with PlayStation

[hojo-ifollowjp]

Our sentry caught ReferenceError for dexie.js.

Info:
User-agent: Mozilla/5.0 (PlayStation; PlayStation 4/10.71) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.4 Safari/605.1.15

Our source code is as follows:

var g  = window||globalThis||{};
var db = null;

var dbopen = aync function dbopen(){
  db = new Dexie('<dbname>', {
    autoOpen:     true,
    allowEmptyDB: true,
  });
  db.version(<dbversion>).stores({
    data: [
      '&key',
      ...<somekeys>,
    ].join(','),
  });
  return db.open()
  .then((function(){
    g.db = db;
  }).bind(this))
  .catch((function(err){
    console.error(err);
    db   = null;
    g.db = db;
  }).bind(this))
  ;
};