Examine source code of feeshky the flashcards

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  "manifest_version": 2,
  "name": "feeshky",
  "version": "3.1",
  "description": "Flashcards containing english to english idioms explanation.",
  "icons": {
    "48": "icons/48.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/48.png",
    "default_title": "Feeshky",
    "default_popup": "popup/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{30bb9033-7f2d-408a-b9db-c89bbadb6ab0}"
    }
  }
}