Examine source code of Chrome Sounds

{
  "name": "Chrome Sounds",
  "version": "1.2",
  "description": "Enjoy a more magical and immersive experience when browsing the web using the power of sound.",
  "background": {
    "scripts": [
      "bg.js"
    ]
  },
  "options_page": "options.html",
  "icons": {
    "128": "icon.png"
  },
  "permissions": [
    "tabs",
    "bookmarks",
    "http://*/*",
    "https://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true
    }
  ],
  "manifest_version": 2
}