Examine source code of Recipe Saver

{
  "manifest_version": 2,
  "name": "Recipe Saver",
  "version": "1.0",
  "description": "Save and manage your favorite recipes found online.",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "icons": {
    "48": "icons/recipe_saver_48.png",
    "128": "icons/recipe_saver_128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/recipe_saver_48.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{040d0cdf-4a10-42ac-bd65-11f1a9a6f639}"
    }
  }
}