Examine source code of Search with Google Map

{
  "manifest_version": 2,
  "name": "Search on Google Map",
  "version": "0.2resigned1",
  "description": "Right-click to search the selected text on Google Map",
  "icons": {
    "512": "icons/icon-512.png"
  },
  "permissions": [
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{28b773bf-5ae2-4732-b58f-b31b632ae0c3}"
    }
  }
}