Examine source code of Elemental Symbol Flash

{
  "manifest_version": 2,
  "name": "Elemental Symbol Flash",
  "version": "1.0",
  "description": "Master periodic table symbols, atomic numbers, and chemical properties with quick interactive chemistry quizzes.",
  "icons": {
    "48": "elemental_symbol_flash_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Elemental Symbol Flash"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{631abeb9-5820-4c01-b11d-789110617686}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}