Examine source code of Tab Volume Booster

{
  "manifest_version": 3,
  "name": "Tab Volume Booster",
  "version": "1.1.0",
  "description": "Boost the volume of the current tab beyond 100%.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_title": "Tab Volume Booster",
    "default_popup": "popup.html",
    "default_icon": "icons/icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "page-audio.js"
      ],
      "world": "MAIN",
      "run_at": "document_start"
    }
  ],
  "icons": {
    "128": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tab-volume-booster-2026@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}