Examine source code of Current Tab Google

{
  "manifest_version": 2,
  "name": "Current Tab Google",
  "version": "1.1",
  "description": "Open Google.com in current tab.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "64": "icons/icon-64.png"
  },
  "browser_action": {
    "default_icon": {
      "64": "icons/icon-64.png"
    }
  },
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c584107d-9ee6-49f7-98b3-2bcf7348d135}"
    }
  }
}