Examine source code of Idiom Explorer

{
  "manifest_version": 2,
  "name": "Idiom Explorer",
  "version": "1.0",
  "description": "Master English idioms with daily fill-in-the-blank challenges to expand your vocabulary and cultural knowledge!",
  "icons": {
    "48": "idiom_explorer_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Idiom Explorer"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{bfe3a1eb-2c5d-46fa-90fb-1585ab24bac8}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}