Examine source code of Cinemode (discontinued)

{
  "manifest_version": 2,
  "name": "Cinemode",
  "version": "1.0.2",
  "description": "Turn on cinema mode on any webpage with video.",
  "icons": {
    "48": "icons/cinemode48.png"
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/cinemode48.png"
    }
  },
  "background": {
    "scripts": [
      "cinemode-background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "Cinemode.js",
        "cinemode-content.js"
      ],
      "css": [
        "cinemode.css"
      ]
    }
  ],
  "permissions": [
    "activeTab"
  ]
}