Examine source code of Xpose

{
  "name": "Xpose",
  "version": "1.0",
  "description": "Xpose is extension that helps you to scrap web pages. It shows you a lot of information about the page.",
  "icons": {
    "128": "img/spy.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "img/spy.png"
  },
  "manifest_version": 2
}