Examine source code of Epic Legends Quest

{
  "manifest_version": 2,
  "name": "Epic Legends Quest",
  "version": "1.0",
  "description": "Dive into epic tales! This popup quiz gives a Vietnamese clue about legendary heroes and figures from mythology and folklore — guess their English name. Perfect for mythology lovers, gamers, history fans, and English learners who enjoy heroic adventures.",
  "icons": {
    "48": "myth_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Epic Legends Quest"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b353b46a-0d73-40d6-90a7-ebea07605b46}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}