Examine source code of YouTube → Gemini Summarizer

{
  "manifest_version": 2,
  "name": "YouTube → Gemini Summarizer",
  "version": "1.0",
  "description": "One-click: summarize any YouTube video with Google Gemini.",
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "contextMenus",
    "clipboardWrite",
    "*://www.youtube.com/*",
    "*://gemini.google.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://gemini.google.com/*"
      ],
      "js": [
        "content_gemini.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_icon": "icons/icon.svg",
    "default_title": "Summarize with Gemini"
  },
  "icons": {
    "48": "icons/icon.svg",
    "128": "icons/icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "yt-gemini-summarizer@extension",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}