Examine source code of AI Studio TTS Helper

{
  "manifest_version": 2,
  "name": "AI Studio TTS Helper",
  "version": "5.3.7",
  "description": "Auto-inject scripts and generate speech on AI Studio",
  "browser_specific_settings": {
    "gecko": {
      "id": "aistudio-tts-helper-v5@unique.ext",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "downloads",
    "https://aistudio.google.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://aistudio.google.com/generate-speech*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}