Examine source code of Phrase Master

{
  "manifest_version": 2,
  "name": "Phrase Master",
  "version": "1.0",
  "description": "A fun browser extension to practice translating common English phrases into Vietnamese, helping users improve their conversational vocabulary skills.",
  "icons": {
    "48": "phrase_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Phrase Master"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8b45f52e-390e-4ed5-822f-696cbf12d48d}"
    }
  }
}