Examine source code of PackageTrack

{
  "manifest_version": 3,
  "name": "PackageTrack",
  "version": "4",
  "description": "Opens a new tab to track a highlighted shipping number.",
  "permissions": [
    "contextMenus"
  ],
  "icons": {
    "16": "icon16.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "c.varga-sagat@ecos.at",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}