Examine source code of ogruNotifier

{
  "description": "__MSG_extensionDescription__",
  "manifest_version": 2,
  "name": "ogruNotifier",
  "version": "1.2.4",
  "homepage_url": "https://github.com/innokentiyt/ogruNotifier",
  "icons": {
    "32": "icons/ogru-32.png",
    "48": "icons/ogru-48.png"
  },
  "default_locale": "en",
  "permissions": [
    "*://www.old-games.ru/*",
    "alarms",
    "cookies",
    "webRequest",
    "storage"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "background": {
    "scripts": [
      "background-script.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "32": "icons/ogru-32.png",
      "48": "icons/ogru-48.png"
    },
    "default_title": "Old-Games.RU Notifier"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ee2f5211-1f96-439e-a18e-a509874706c5}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}