Examine source code of Directions & Prepositions

{
  "manifest_version": 2,
  "name": "Directions & Prepositions of Place",
  "version": "1.0",
  "description": "Popup game to practice Vietnamese direction words and prepositions of place in English – useful for giving directions and describing locations.",
  "icons": {
    "48": "directions_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Directions & Prepositions of Place"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{cbeb548a-71f9-49dc-a821-1c60309cb846}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}