Examine source code of Minimal Volume Booster

{
  "name": "Minimal Volume Booster",
  "description": "Boost tab audio volume up to 600%",
  "version": "1.0.1",
  "manifest_version": 3,
  "action": {
    "default_title": "Volume Booster",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "permissions": [
    "scripting",
    "activeTab",
    "tabs",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "minimal-volume-booster@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}