Examine source code of Daily Phrase Master

{
  "manifest_version": 2,
  "name": "Daily Phrase Master",
  "version": "1.0",
  "description": "Master essential Vietnamese daily phrases and expressions through quick interactive quizzes. Perfect for beginners and travelers to improve real-life Vietnamese conversation skills in just a few minutes a day.",
  "icons": {
    "48": "vocab_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Daily Phrase Master"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ea7ec021-6e7f-4599-9390-5621626c8a73}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}