Examine source code of EcoWord Expedition

{
  "manifest_version": 2,
  "name": "EcoWord Expedition",
  "version": "1.0",
  "description": "Embark on a green linguistic journey! Test and expand your English vocabulary related to nature, wildlife, and ecosystems through interactive Vietnamese prompts.",
  "icons": {
    "48": "ecoword_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "EcoWord Expedition"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{066ce55a-f117-4e7a-9fc6-2cfbcfb06b0f}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}