Examine source code of Phrasal Verb_Challenge

{
  "manifest_version": 2,
  "name": "Phrasal Verb Challenge",
  "version": "1.0",
  "description": "Master English phrasal verbs with this interactive popup quiz! Each question gives a Vietnamese meaning or example sentence — guess the correct phrasal verb in English. Perfect for intermediate and advanced learners to boost natural fluency.",
  "icons": {
    "48": "phrasal_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Phrasal Verb Challenge"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4e74cc1f-4255-4156-bf6b-4e53c5f3cf73}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}