Examine source code of Русский словарь в дореформенной орфографии

{
  "dictionaries": {
    "ru": "dictionaries/ru-petr1708.dic"
  },
  "version": "1.2resigned1",
  "browser_specific_settings": {
    "gecko": {
      "id": "ru_petr1708@dictionaries.addons.mozilla.org"
    }
  },
  "name": "Русский словарь в дореформенной орфографии",
  "manifest_version": 2
}