Examine source code of Web Wizard

{
  "manifest_version": 2,
  "name": "Web Wizard",
  "version": "1.0",
  "description": "Perform web wizardry in the form of css magic!",
  "icons": {
    "16": "/images/get_started16.png",
    "32": "/images/get_started32.png",
    "48": "/images/get_started48.png",
    "128": "/images/get_started128.png"
  },
  "permissions": [
    "tabs",
    "cookies",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": "/images/get_started16.png",
    "default_title": "Web Wizard",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "updateCss.js"
      ]
    }
  ]
}